English Troubleshooting Guide

8/17/2019 English Troubleshooting Guide

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IBM System Storage SAN Volume Controller

Troubleshooting Guide

Version 4.3.1

GC27-2227-00


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IBM System Storage SAN Volume Controller


Version 4.3.1

GC27-2227-00


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Note:

Before using this information and the product it supports, read the information in Notices.

This edition applies to version 4, release 3, modification 1 of the IBM System Storage SAN Volume Controller and toall subsequent releases and modifications until otherwise indicated in new editions. This edition and GC27-2226-00replace GC26-7901-03.

© Copyright International Business Machines Corporation 2003, 2008.US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contractwith IBM Corp.


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Contents

Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

About this guide . . . . . . . . . . . . . . . . . . . . . . . . ixWho should use this guide . . . . . . . . . . . . . . . . . . . . . ix

Emphasis . . . . . . . . . . . . . . . . . . . . . . . . . . . ixSAN Volume Controller library and related publications. . . . . . . . . . . xRelated Web sites . . . . . . . . . . . . . . . . . . . . . . . . xvHow to order IBM publications . . . . . . . . . . . . . . . . . . . xvHow to send your comments. . . . . . . . . . . . . . . . . . . . xvi

Chapter 1. SAN Volume Controller overview . . . . . . . . . . . . . 1Clusters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Cluster addressing . . . . . . . . . . . . . . . . . . . . . . . 2Cluster IP failover . . . . . . . . . . . . . . . . . . . . . . . 3

SAN fabric overview . . . . . . . . . . . . . . . . . . . . . . . 4Service mode overview . . . . . . . . . . . . . . . . . . . . . . 6

Chapter 2. Introducing the SAN Volume Controller hardware components 7SAN Volume Controller nodes . . . . . . . . . . . . . . . . . . . . 7

SAN Volume Controller front panel controls and indicators . . . . . . . . 7SAN Volume Controller rear panel indicators and connectors . . . . . . . 16Fibre-channel port numbers and worldwide port names . . . . . . . . . 28Requirements for the SAN Volume Controller environment . . . . . . . . 30

Redundant ac-power switch . . . . . . . . . . . . . . . . . . . . 38Redundant ac power environment requirements. . . . . . . . . . . . 39Cabling of redundant ac-power switch (example) . . . . . . . . . . . 40

Uninterruptible power supply . . . . . . . . . . . . . . . . . . . . 422145 UPS-1U . . . . . . . . . . . . . . . . . . . . . . . . 422145 UPS. . . . . . . . . . . . . . . . . . . . . . . . . . 48

Uninterruptible power-supply environment requirements . . . . . . . . . 53Defining the SAN Volume Controller FRUs. . . . . . . . . . . . . . . 54SAN Volume Controller FRUs . . . . . . . . . . . . . . . . . . 54Redundant ac-power switch FRUs. . . . . . . . . . . . . . . . . 60Uninterruptible power supply FRUs . . . . . . . . . . . . . . . . 60

Performing the node rescue . . . . . . . . . . . . . . . . . . . . 61

Chapter 3. Using the SAN Volume Controller Console and CLI . . . . . . 63Accessing the SAN Volume Controller CLI . . . . . . . . . . . . . . . 66Viewing the node status . . . . . . . . . . . . . . . . . . . . . 69Checking the status of the node using the CLI . . . . . . . . . . . . . 69Viewing the status of the node ports . . . . . . . . . . . . . . . . . 70Checking the status of the node ports using the CLI . . . . . . . . . . . 70

Deleting a node from a cluster . . . . . . . . . . . . . . . . . . . 71Deleting a node from a cluster using the CLI . . . . . . . . . . . . . . 73Adding a node to a cluster . . . . . . . . . . . . . . . . . . . . 75Adding a node to the cluster using the CLI. . . . . . . . . . . . . . . 76Shutting down a node . . . . . . . . . . . . . . . . . . . . . . 77Shutting down the cluster . . . . . . . . . . . . . . . . . . . . . 77

Shutting down a cluster. . . . . . . . . . . . . . . . . . . . . 78Shutting down a cluster using the CLI . . . . . . . . . . . . . . . 79

Viewing the VDisk status . . . . . . . . . . . . . . . . . . . . . 80Verifying and repairing mirrored VDisk copies . . . . . . . . . . . . . 80

Viewing the progress of mirror copy verification . . . . . . . . . . . . 81

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Validating and repairing mirrored VDisk copies using the CLI . . . . . . . . 81Repairing offline space-efficient VDisks . . . . . . . . . . . . . . . . 83

Viewing the progress of space-efficient VDisk copy repair . . . . . . . . 83Repairing a space-efficient VDisk using the CLI . . . . . . . . . . . . . 84Recovering from offline VDisks . . . . . . . . . . . . . . . . . . . 84Recovering from offline VDisks using the CLI . . . . . . . . . . . . . . 85

Recovering a node and returning it to the cluster using the CLI . . . . . . 86

Recovering VDisks . . . . . . . . . . . . . . . . . . . . . . 87Recovering offline VDisks using the CLI. . . . . . . . . . . . . . . 88Moving offline VDisks to their original I/O group using the CLI . . . . . . 88

Creating MDisk groups . . . . . . . . . . . . . . . . . . . . . . 89Adding MDisks to MDisk groups . . . . . . . . . . . . . . . . . 89Viewing the MDisk status . . . . . . . . . . . . . . . . . . . . 90Discovering MDisks . . . . . . . . . . . . . . . . . . . . . . 90Creating MDisk groups using the CLI. . . . . . . . . . . . . . . . 91

Viewing the fibre-channel fabric connections . . . . . . . . . . . . . . 97Displaying all controllers logged into a node . . . . . . . . . . . . . 99Displaying all active devices . . . . . . . . . . . . . . . . . . 100

Changing the fibre-channel network speed . . . . . . . . . . . . . . 101Determining the fibre-channel port speed . . . . . . . . . . . . . . 101Changing the fibre-channel port speed for a node not in a cluster . . . . . 103Changing the fibre-channel port speed for a node in a cluster . . . . . . 104

Checking disk controller status using the CLI . . . . . . . . . . . . . 104Determining the failing enclosure or disk controller using the CLI . . . . . . 105Replacing a faulty node with a spare node . . . . . . . . . . . . . . 106Replacing a faulty node in the cluster using the CLI . . . . . . . . . . . 110Viewing and updating license settings . . . . . . . . . . . . . . . . 115Viewing and updating license settings using the CLI . . . . . . . . . . . 115Displaying and saving log and dump files . . . . . . . . . . . . . . . 116Viewing the license settings log . . . . . . . . . . . . . . . . . . 116Viewing the feature log using the CLI . . . . . . . . . . . . . . . . 117Analyzing the error log. . . . . . . . . . . . . . . . . . . . . . 117

Analyzing the error log using the CLI . . . . . . . . . . . . . . . . 118Marking errors as fixed . . . . . . . . . . . . . . . . . . . . . 118Running the cluster maintenance procedure . . . . . . . . . . . . . . 119Using directed maintenance procedures . . . . . . . . . . . . . . . 119

Chapter 4. Viewing the vital product data . . . . . . . . . . . . . . 125Viewing the vital product data . . . . . . . . . . . . . . . . . . . 125Viewing cluster properties . . . . . . . . . . . . . . . . . . . . 125Displaying the vital product data using the CLI . . . . . . . . . . . . . 126

Displaying node properties using the CLI . . . . . . . . . . . . . . 126Displaying cluster properties using the CLI . . . . . . . . . . . . . 127

Understanding the fields for the node VPD . . . . . . . . . . . . . . 128Understanding the fields for the cluster VPD . . . . . . . . . . . . . 131

Chapter 5. Using the front panel of the SAN Volume Controller . . . . . 135Boot progress indicator . . . . . . . . . . . . . . . . . . . . . 135Boot failed . . . . . . . . . . . . . . . . . . . . . . . . . . 135Charging. . . . . . . . . . . . . . . . . . . . . . . . . . . 136Error codes. . . . . . . . . . . . . . . . . . . . . . . . . . 136Hardware boot . . . . . . . . . . . . . . . . . . . . . . . . 137Node rescue request . . . . . . . . . . . . . . . . . . . . . . 137Power failure . . . . . . . . . . . . . . . . . . . . . . . . . 138Powering off . . . . . . . . . . . . . . . . . . . . . . . . . 138Recovering . . . . . . . . . . . . . . . . . . . . . . . . . . 138

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Restarting . . . . . . . . . . . . . . . . . . . . . . . . . . 139Shutting down. . . . . . . . . . . . . . . . . . . . . . . . . 139Validate WWNN? . . . . . . . . . . . . . . . . . . . . . . . 139SAN Volume Controller menu options . . . . . . . . . . . . . . . . 140

Cluster options . . . . . . . . . . . . . . . . . . . . . . . 142Node options . . . . . . . . . . . . . . . . . . . . . . . . 146Version option. . . . . . . . . . . . . . . . . . . . . . . . 154

Ethernet option . . . . . . . . . . . . . . . . . . . . . . . 154Fibre-channel port-1 through 4 option . . . . . . . . . . . . . . . 154Select language? option . . . . . . . . . . . . . . . . . . . . 155

Service mode . . . . . . . . . . . . . . . . . . . . . . . . . 156Using the power control for the SAN Volume Controller node . . . . . . . 159

Chapter 6. Diagnosing problems . . . . . . . . . . . . . . . . . 161Error reporting. . . . . . . . . . . . . . . . . . . . . . . . . 162

Power-on self-test . . . . . . . . . . . . . . . . . . . . . . 162Data and event notifications. . . . . . . . . . . . . . . . . . . 164Call Home and inventory e-mail information . . . . . . . . . . . . . 164

Understanding the error log . . . . . . . . . . . . . . . . . . . . 167Managing the error log . . . . . . . . . . . . . . . . . . . . 168

Viewing the error log . . . . . . . . . . . . . . . . . . . . . 168Describing the fields in the error log. . . . . . . . . . . . . . . . 171

Understanding the error codes. . . . . . . . . . . . . . . . . . . 174Using the error code tables . . . . . . . . . . . . . . . . . . . 174Event codes . . . . . . . . . . . . . . . . . . . . . . . . 174Error Codes . . . . . . . . . . . . . . . . . . . . . . . . 180Determining a hardware boot failure . . . . . . . . . . . . . . . 189Understanding the boot codes . . . . . . . . . . . . . . . . . . 190Performing the node rescue. . . . . . . . . . . . . . . . . . . 207Understanding the node rescue codes . . . . . . . . . . . . . . . 208Understanding the node error codes . . . . . . . . . . . . . . . 212Understanding the create cluster error codes . . . . . . . . . . . . 224

Understanding the cluster recovery codes . . . . . . . . . . . . . 225Understanding cluster error codes . . . . . . . . . . . . . . . . 225SAN problem determination. . . . . . . . . . . . . . . . . . . . 330Fibre-channel link failures . . . . . . . . . . . . . . . . . . . . 330Servicing storage systems . . . . . . . . . . . . . . . . . . . . 331Troubleshooting the SAN Volume Controller Console . . . . . . . . . . 332

Updating SSL certificates. . . . . . . . . . . . . . . . . . . . 332Replacing the SSH key pair. . . . . . . . . . . . . . . . . . . 333Checking connections to the cluster when the status is No Contact . . . . 335Cannot access the SAN Volume Controller Console login screen . . . . . 336Cannot access the cluster from the SAN Volume Controller Console. . . . 336Troubleshooting unexpected shutdowns of the SAN Volume Controller

Console . . . . . . . . . . . . . . . . . . . . . . . . . 337

WebSphere Application Server service keeps stopping . . . . . . . . . 337Websphere and CIM Logging . . . . . . . . . . . . . . . . . . 338

Chapter 7. Using the maintenance analysis procedures . . . . . . . . 341MAP 5000: Start . . . . . . . . . . . . . . . . . . . . . . . . 341MAP 5050: Power 2145-8G4, 2145-8F4, and 2145-8F2 . . . . . . . . . 349MAP 5060: Power 2145-8A4 . . . . . . . . . . . . . . . . . . . 354MAP 5100: Power 2145-4F2 . . . . . . . . . . . . . . . . . . . 358MAP 5150: 2145 UPS-1U . . . . . . . . . . . . . . . . . . . . 361MAP 5200: 2145 UPS . . . . . . . . . . . . . . . . . . . . . . 366MAP 5250: 2145 UPS-1U repair verification . . . . . . . . . . . . . . 370

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MAP 5300: 2145 UPS repair verification . . . . . . . . . . . . . . . 371MAP 5320: Redundant ac power . . . . . . . . . . . . . . . . . . 373MAP 5340: Redundant ac power verification . . . . . . . . . . . . . 374MAP 5350: Powering off a SAN Volume Controller node . . . . . . . . . 376

Using the SAN Volume Controller Console to power off a node. . . . . . 377Using the SAN Volume Controller CLI to power off a node . . . . . . . 380Using the SAN Volume Controller Power control button . . . . . . . . 381

MAP 5400: Front panel . . . . . . . . . . . . . . . . . . . . . 382MAP 5500: Ethernet . . . . . . . . . . . . . . . . . . . . . . 385MAP 5600: Fibre-channel . . . . . . . . . . . . . . . . . . . . 389MAP 5700: Repair verification . . . . . . . . . . . . . . . . . . . 395MAP 5800: Light path . . . . . . . . . . . . . . . . . . . . . . 397

Light path for SAN Volume Controller 2145-8A4 . . . . . . . . . . . 397Light path for SAN Volume Controller 2145-8G4 . . . . . . . . . . . 400Light path for SAN Volume Controller 2145-8F2 and SAN Volume Controller

2145-8F4. . . . . . . . . . . . . . . . . . . . . . . . . 404MAP 5900: Hardware boot . . . . . . . . . . . . . . . . . . . . 408

Accessibility . . . . . . . . . . . . . . . . . . . . . . . . . 415

Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . 417Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . 419Electronic emission notices . . . . . . . . . . . . . . . . . . . . 419

Federal Communications Commission (FCC) statement . . . . . . . . 419Industry Canada compliance statement . . . . . . . . . . . . . . 420Avis de conformité à la réglementation d’Industrie Canada . . . . . . . 420New Zealand compliance statement. . . . . . . . . . . . . . . . 420European Union EMC Directive conformance statement . . . . . . . . 420Germany compliance statement . . . . . . . . . . . . . . . . . 421Japanese Voluntary Control Council for Interference (VCCI) statement 421People’s Republic of China Class A Electronic Emission Statement . . . . 422International Electrotechnical Commission (IEC) statement . . . . . . . 422

United Kingdom telecommunications requirements . . . . . . . . . . 422Korean Class A Electronic Emission Statement . . . . . . . . . . . 422Taiwan Class A compliance statement . . . . . . . . . . . . . . . 422

European Contact Information . . . . . . . . . . . . . . . . . . . 422Taiwan Contact Information . . . . . . . . . . . . . . . . . . . . 423

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . 425

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . 447

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Tables

1. 2145 UPS-1U error indicators . . . . . . . . . . . . . . . . . . . . . . . . . . 442. SAN Volume Controller 2145-8A4 FRU descriptions . . . . . . . . . . . . . . . . . . 543. SAN Volume Controller 2145-8G4 FRU descriptions . . . . . . . . . . . . . . . . . . 564. SAN Volume Controller 2145-8F4 FRU descriptions . . . . . . . . . . . . . . . . . . 575. SAN Volume Controller 2145-8F2 FRU descriptions . . . . . . . . . . . . . . . . . . 586. SAN Volume Controller 2145-4F2 FRU descriptions . . . . . . . . . . . . . . . . . . 597. Uninterruptible power supply FRU descriptions . . . . . . . . . . . . . . . . . . . . 608. Corrective actions when the Availability Status is not OK . . . . . . . . . . . . . . . . 659. Extent size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

10. Fibre-channel viewing definitions . . . . . . . . . . . . . . . . . . . . . . . . . 9811. Fields for the system board . . . . . . . . . . . . . . . . . . . . . . . . . . 12912. Fields for the processors . . . . . . . . . . . . . . . . . . . . . . . . . . . 12913. Fields that are repeated for cache installed on each processor . . . . . . . . . . . . . 12914. Fields for the fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13015. Fields that are repeated for each installed memory module . . . . . . . . . . . . . . . 13016. Fields that are repeated for each fibre-channel adapter card that is installed . . . . . . . . 130

17. Fields that are repeated for each SCSI and IDE device that is installed . . . . . . . . . . 13018. Fields that are specific to the node software . . . . . . . . . . . . . . . . . . . . 13119. Fields that are provided for the front panel . . . . . . . . . . . . . . . . . . . . . 13120. Fields that are provided for the uninterruptible power supply assembly that is powering the node 13121. Fields that are provided for the cluster . . . . . . . . . . . . . . . . . . . . . . 13222. Descriptions of Log Entry Icons . . . . . . . . . . . . . . . . . . . . . . . . . 17023. Description of data fields for the error log . . . . . . . . . . . . . . . . . . . . . 17124. Description of object types and object IDs for the error log . . . . . . . . . . . . . . . 17225. Description of flags for the error log . . . . . . . . . . . . . . . . . . . . . . . 17226. Reported status for combinations of error-log status flags . . . . . . . . . . . . . . . 17327. Description of types of error log flags . . . . . . . . . . . . . . . . . . . . . . . 17328. Information event codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17529. Configuration event codes . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

30. Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18131. Commands for logging and tracing CIM agent. . . . . . . . . . . . . . . . . . . . 33932. 2145 UPS-1U error indicators. . . . . . . . . . . . . . . . . . . . . . . . . . 36233. SAN Volume Controller fibre-channel adapter assemblies . . . . . . . . . . . . . . . 39334. SAN Volume Controller fibre-channel adapter connection hardware . . . . . . . . . . . . 39335. SAN Volume Controller 2145-8A4 diagnostics panel LED prescribed actions . . . . . . . . 40036. Diagnostics panel LED prescribed actions . . . . . . . . . . . . . . . . . . . . . 40337. Diagnostics panel LED prescribed actions . . . . . . . . . . . . . . . . . . . . . 406

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About this guide

This guide describes how to service the IBM ® System Storage™ SAN VolumeController.

The chapters that follow introduce you to the SAN Volume Controller, the redundantac-power switch, and the uninterruptible power supply. They describe how you canconfigure and check the status of one SAN Volume Controller node or a cluster ofnodes through the front panel.

The vital product data (VPD) chapter provides information about the VPD thatuniquely defines each hardware and microcode element that is in the SAN VolumeController. You can also learn how to diagnose problems using the SAN VolumeController, the uninterruptible power supply, and the IBM System StorageProductivity Center or the master console.

The maintenance analysis procedures (MAPs) can help you analyze failures thatoccur in a SAN Volume Controller. With the MAPs, you can isolate the field

replaceable units (FRUs) of the SAN Volume Controller that fail. Begin all problemdetermination and repair procedures from “MAP 5000: Start” on page 341.

Note: IBM System Storage SAN Volume Controller Troubleshooting Guide and theIBM System Storage SAN Volume Controller Hardware Maintenance Guide

were formerly combined in one book that was titled IBM System Storage SAN Volume Controller Service Guide .

Who should use this guide

This guide is intended for system administrators or systems servicesrepresentatives who use and diagnose problems with the SAN Volume Controller,the redundant ac-power switch, the uninterruptible power supply, the IBM System

Storage Productivity Center, and the master console.

Emphasis

Different typefaces are used in this guide to show emphasis.

The following typefaces are used to show emphasis:

Boldface Text in boldface represents menu items andcommand names.

Italics Text in italics is used to emphasize a word.In command syntax, it is used for variablesfor which you supply actual values, such as

a default directory or the name of a cluster.Monospace Text in monospace identifies the data or

commands that you type, samples ofcommand output, examples of program codeor messages from the system, or names ofcommand flags, parameters, arguments, andname-value pairs.

© Copyright IBM Corp. 2003, 2008 ix


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SAN Volume Controller library and related publications

A list of other publications that are related to this product are provided to you foryour reference.

The tables in this section list and describe the following publications:

v The publications that make up the library for the IBM System Storage SANVolume Controller

v Other IBM publications that relate to the SAN Volume Controller

SAN Volume Controller library

The following table lists and describes the publications that make up the SANVolume Controller library. Unless otherwise noted, these publications are availablein Adobe ® portable document format (PDF) from the following Web site:

www.ibm.com/storage/support/2145

Title Description Order number

IBM System Storage SAN Volume Controller Planning

Guide

This guide introduces theSAN Volume Controller andlists the features you canorder. It also providesguidelines for planning theinstallation and configurationof the SAN VolumeController.

GA32-0551

IBM System Storage SAN

Volume Controller Model

2145-8A4 Hardware

Installation Guide

This guide provides theinstructions that the IBMservice representative usesto install the hardware forSAN Volume Controllermodel 2145-8A4.

GC27-2219


Volume Controller Model

2145-8G4 Hardware

Installation Guide

This guide provides theinstructions that the IBMservice representative usesto install the hardware forSAN Volume Controllermodel 2145-8G4.

GC27-2220


Volume Controller Software

Installation and Configuration

Guide

This guide providesguidelines for configuringyour SAN Volume Controller.Instructions for backing upand restoring the clusterconfiguration, using andupgrading the SAN VolumeController Console, using theCLI, upgrading the SANVolume Controller software,and replacing or addingnodes to a cluster areincluded.

SC23-6628

x SAN Volume Controller Troubleshooting Guide

http://www.ibm.com/storage/support/2145http://www.ibm.com/storage/support/2145


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Volume Controller CIM Agent

Developer’s Guide

This guide describes theconcepts of the CommonInformation Model (CIM)environment. Steps aboutusing the CIM agent objectclass instances to complete

basic storage configurationtasks, establishing new CopyServices relationships, andperforming CIM agentmaintenance and diagnostictasks are included.

SC23-6665


Volume Controller

Command-Line Interface

User’s Guide

This guide describes thecommands that you can usefrom the SAN VolumeController command-lineinterface (CLI).

SC26-7903


Volume Controller Host

Attachment Guide

This guide providesguidelines for attaching the

SAN Volume Controller toyour host system.

SC26-7905


Volume Controller


This guide describes thefeatures of each SAN VolumeController model, explainshow to use the front panel,and provides maintenanceanalysis procedures to helpyou diagnose and solveproblems with the SANVolume Controller.

GC27-2227


Volume Controller Hardware

Maintenance Guide

This guide provides theinstructions that the IBM

service representative usesto service the SAN VolumeController hardware,including the removal andreplacement of parts.

GC27-2226


Volume Controller Models

2145-8F2 and 2145-8F4

Hardware Installation Guide

This guide provides theinstructions that the IBMservice representative usesto install the hardware forSAN Volume Controllermodels 2145-8F2 and2145-8F4.

GC27-2221


Volume Controller Model 2145-4F2 Hardware

Installation Guide

This guide provides the

instructions that the IBMservice representative usesto install the hardware forSAN Volume Controllermodel 2145-4F2.

GC27-2222


Volume Controller Master

Console Guide

This guide describes how toinstall, maintain, and servicethe master console.

GC27-2223

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IBM Systems Safety Notices This guide containstranslated caution anddanger statements. Eachcaution and dangerstatement in the SAN VolumeController documentation has

a number that you can use tolocate the correspondingstatement in your language inthe IBM Systems Safety Notices document.

G229-9054

Other IBM publications

The following table lists and describes other IBM publications that contain additionalinformation that is related to the SAN Volume Controller.

You can download IBM eServer™ IBM xSeries ® and IBM System x™ publications

from the following Web site:

www.ibm.com/jct01004c/systems/support/


IBM System Storage

Productivity Center

Introduction and Planning

Guide

This guide introduces the IBMSystem Storage ProductivityCenter hardware andsoftware.

SC23-8824

Read This First: Installing the

IBM System Storage

Productivity Center

This guide describes how toinstall the IBM SystemStorage Productivity Centerhardware.

GI11-8938

IBM System Storage

Productivity Center User’s

Guide

This guide describes how toconfigure the IBM SystemStorage Productivity Centersoftware.

SC27-2336

IBM System Storage

Multipath Subsystem Device

Driver User’s Guide

This guide describes the IBMSystem Storage MultipathSubsystem Device Driver forIBM System Storage productsand how to use it with theSAN Volume Controller.

GC52-1309

IBM System Storage DS

Storage Manager Version

10.30 Installation and Host

Support Guide

This guide providesinformation about how toplan, install, configure, andwork with IBM SystemStorage DS™ StorageManager.

GC53-1135

xii SAN Volume Controller Troubleshooting Guide

http://www-304.ibm.com/jct01004c/systems/support/http://www-304.ibm.com/jct01004c/systems/support/


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Storage Manager Version

10.30 Copy Services Guide

This guide providesinformation about setting up,installing, configuring, andworking with the three IBMSystem Storage DS StorageManager premium features

that assist with copy services:FlashCopy ® , VolumeCopy,and the Enhanced RemoteMirroring Option.

GC53-1136

IBM System Storage

DS4000/DS5000 Fibre

Channel and Serial ATA

Intermix Premium Feature

Installation Overview

This overview describes howto install the IBM SystemStorage DS4000/DS5000Fibre Channel and Serial ATAIntermix Premium Feature.

GC53-1137

IBM System Storage DS5100

and DS5300 Installation,

User’s and Maintenance

Guide

This guide describes how toinstall and configure the IBMSystem Storage DS5100 andDS5300.

GC53-1140

IBM System Storage

EXP5000 Storage Expansion

Enclosure Installation, User’s,

and Maintenance Guide

This guide describes how toinstall and configure the IBMSystem Storage EXP5000Storage ExpansionEnclosure.

GC53-1141


Storage Manager

Command-line Programming

Guide

This guide describes thecommands that you can usefrom the IBM System StorageDS Storage Managercommand-line interface.

GC52-1275

IBM System Storage DS5000

Quick Start Guide: Quick

Reference for the DS5100,DS5300 and EXP5000

This guide providesinformation about setting up

and installing the DS5100,DS5300 and EXP5000.

GC53-1134

IBM TotalStorage DS4300

Fibre Channel Storage

Subsystem Installation,

User’s, and Maintenance

Guide

This guide describes how toinstall and configure the IBMTotalStorage ® DS4300Fibre-Channel StorageSubsystem.

GC26-7722

IBM eServer xSeries 306m

(Types 8849 and 8491)

Installation Guide

This guide describes how toinstall the IBM eServerxSeries 306m, which is thehardware delivered for someversions of the hardwaremaster console.

MIGR-61615

IBM xSeries 306m (Types 8849 and 8491) User’s Guide

This guide describes how touse the IBM eServer xSeries306m, which is the hardwaredelivered for some versionsof the hardware masterconsole.

MIGR-61901

About this guide xiii


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IBM xSeries 306m (Types

8849 and 8491) Problem

Determination and Service

Guide

This guide can help youtroubleshoot and resolveproblems with the IBMeServer xSeries 306m, whichis the hardware delivered forsome versions of the

hardware master console.

MIGR-62594

IBM eServer xSeries 306

(Type 8836) Installation

Guide

This guide describes how toinstall the IBM eServerxSeries 306, which is thehardware delivered for someversions of the hardwaremaster console.

MIGR-55080


(Type 8836) User’s Guide

This guide describes how touse the IBM eServer xSeries306, which is the hardwaredelivered for some versionsof the hardware masterconsole.

MIGR-55079


(Types 1878, 8489 and 8836)

Hardware Maintenance

Manual and Troubleshooting

Guide

This guide can help youtroubleshoot problems andmaintain the IBM eServerxSeries 306, which is thehardware delivered for someversions of the hardwaremaster console.

MIGR-54820


(Type 8673) Installation

Guide

This guide describes how toinstall the IBM eServerxSeries 305, which is thehardware delivered for someversions of the hardwaremaster console.

MIGR-44200


(Type 8673) User’s Guide

This guide describes how touse the IBM eServer xSeries305, which is the hardwaredelivered for some versionsof the hardware masterconsole.

MIGR-44199


(Type 8673) Hardware

Maintenance Manual and


This guide can help youtroubleshoot problems andmaintain the IBM eServerxSeries 305, which is thehardware delivered for someversions of the hardwaremaster console.

MIGR-44094

IBM TotalStorage 3534

Model F08 SAN Fibre

Channel Switch User’s Guide

This guide introduces the IBMTotalStorage SAN Switch3534 Model F08.

GC26-7454

IBM System x3250 (Types

4364 and 4365) Installation

Guide

This guide describes how toinstall the IBM System x3250,which is the hardwaredelivered for some versionsof the hardware masterconsole.

MIGR-5069761

xiv SAN Volume Controller Troubleshooting Guide


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4364 and 4365) User’s Guide

This guide describes how touse the IBM System x3250,which is the hardwaredelivered for some versionsof the hardware masterconsole.

MIGR-66373


4364 and 4365) Problem

Determination and Service

Guide

This guide can help youtroubleshoot and resolveproblems with the IBMSystem x3250, which is thehardware delivered for someversions of the hardwaremaster console.

MIGR-66374

IBM TotalStorage SAN

Switch 2109 Model F16

User’s Guide

This guide introduces the IBMTotalStorage SAN Switch2109 Model F16.

GC26-7439

IBM TotalStorage SAN

Switch 2109 Model F32

User’s Guide

This guide introduces the IBMTotalStorage SAN Switch

2109 Model F32. It alsodescribes the features of theswitch and tells you where tofind more information aboutthose features.

GC26-7517

Some related publications are available from the following SAN Volume Controllersupport Web site:


Related Web sites

The following Web sites provide information about the SAN Volume Controller orrelated products or technologies:

Type of information Web site

SAN Volume Controllersupport


Technical support for IBMstorage products

www.ibm.com/storage/support/

How to order IBM publications

The IBM Publications Center is a worldwide central repository for IBM productpublications and marketing material.

The IBM Publications Center offers customized search functions to help you find thepublications that you need. Some publications are available for you to view ordownload at no charge. You can also order publications. The publications centerdisplays prices in your local currency. You can access the IBM Publications Centerthrough the following Web site:

www.ibm.com/shop/publications/order/

About this guide xv

http://www.ibm.com/storage/support/2145http://www.ibm.com/storage/support/2145http://www.ibm.com/storage/support/http://www.ibm.com/shop/publications/order/http://www.ibm.com/shop/publications/order/http://www.ibm.com/storage/support/http://www.ibm.com/storage/support/2145http://www.ibm.com/storage/support/2145


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How to send your comments

Your feedback is important to help us provide the highest quality information. If youhave any comments about this book or any other documentation, you can submitthem in one of the following ways:

v E-mail

Submit your comments electronically to the following e-mail address:[email protected]

Be sure to include the name and order number of the book and, if applicable, thespecific location of the text you are commenting on, such as a page number ortable number.

v Mail

Fill out the Readers’ Comments form (RCF) at the back of this book. If the RCFhas been removed, you can address your comments to:

International Business Machines CorporationRCF Processing DepartmentDepartment 61C

9032 South Rita RoadTucson, Arizona 85775-4401U.S.A.

xvi SAN Volume Controller Troubleshooting Guide


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Chapter 1. SAN Volume Controller overview

The SAN Volume Controller combines software and hardware into acomprehensive, modular appliance that uses symmetric virtualization.

Symmetric virtualization is achieved by creating a pool of managed disks (MDisks)from the attached storage systems. Those storage systems are then mapped to aset of virtual disks (VDisks) for use by attached host systems. Systemadministrators can view and access a common pool of storage on the storage areanetwork (SAN). This functionality helps administrators to use storage resourcesmore efficiently and provides a common base for advanced functions.

A SAN is a high-speed fibre-channel network that connects host systems andstorage devices. In a SAN, a host system can be connected to a storage deviceacross the network. The connections are made through units such as routers,gateways, hubs, and switches. The area of the network that contains these units isknown as the fabric of the network.

SAN Volume Controller software

The SAN Volume Controller software performs the following functions for the hostsystems that attach to SAN Volume Controller over the SAN:

v Creates a single pool of storage

v Provides logical unit virtualization

v Manages logical volumes

v Mirrors logical volumes

The SAN Volume Controller also provides the following functions:

v Large scalable cache

v Copy Services

– IBM FlashCopy ® (point-in-time copy)

– Metro Mirror (synchronous copy)

– Global Mirror (asynchronous copy)

– Data migration

v Space management

– Mapping that is based on desired performance characteristics

– Metering of service quality

– Space-efficient logical volumes (thin provisioning)

SAN Volume Controller hardware

Each SAN Volume Controller node is an individual server in a SAN VolumeController cluster on which the SAN Volume Controller software runs.

The nodes are always installed in pairs, with a minimum of one and a maximum offour pairs of nodes constituting a cluster . Each pair of nodes is known as an I/O group . All I/O operations that are managed by the nodes in an I/O group are cachedon both nodes.

Note: I/O groups take the storage that is presented to the SAN by the storagesystems as MDisks and translates the storage into logical disks, known as

© Copyright IBM Corp. 2003, 2008 1

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VDisks, that are used by applications on the hosts. A node resides in onlyone I/O group and provides access to the VDisks in that I/O group.

The SAN Volume Controller 2145-8A4 and the SAN Volume Controller 2145-8G4models are currently available. In addition, the following models of SAN VolumeController nodes have been available in previous releases and are still supportedwith the latest SAN Volume Controller software:

v SAN Volume Controller 2145-8F4v SAN Volume Controller 2145-8F2

v SAN Volume Controller 2145-4F2

Related reference

“SAN Volume Controller front panel controls and indicators” on page 7The controls and indicators are used for power and navigation and to indicateinformation, such as system activity, service and configuration options, servicecontroller failures, and node identification.

“SAN Volume Controller rear panel indicators and connectors” on page 16The rear panel indicators for the SAN Volume Controller are located on the backpanel assembly. The external connectors are located on the SAN Volume Controller

node and the power supply assembly.“SAN Volume Controller 2145-8G4 environment requirements” on page 32Before the SAN Volume Controller 2145-8G4 is installed, the physical environmentmust meet certain requirements. This includes verifying that adequate space isavailable and that requirements for power and environmental conditions are met.

Clusters

All of your configuration and service tasks are performed at the cluster level.Therefore, after configuring your cluster, you can take advantage of thevirtualization and the advanced features of the SAN Volume Controller.

A cluster can consist of two nodes, with a maximum of eight nodes. Therefore, youcan assign up to eight SAN Volume Controller nodes to one cluster.

All configurations are replicated across all nodes in the cluster; however, someservice actions can be performed only at the node level. Because configuration isperformed at the cluster level, an IP address is assigned to the cluster instead ofeach node.

Cluster addressingEach SAN Volume Controller cluster has an IP address. You can use this addressto access the cluster either through the SAN Volume Controller graphical userinterface or the command-line interface.

You assign an IPv4 address, an IPv6 address, or both to a cluster. When a nodehas been assigned to a cluster, you can display the cluster IP address on the frontpanel by selecting Cluster from the menu.

Configuration nodeA configuration node is a single node that manages configuration activity of thecluster.

If the configuration node fails, the cluster chooses a new configuration node. Thisaction is called configuration node failover. The switch that contains the new nodetakes over the cluster IP address. Thus you can access the cluster through the

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v If software on the failed configuration node is still operational, the software shutsdown the IP interface. If the software cannot shut down the IP interface, thehardware service forces a shut down.

v When the IP interface shuts down, all remaining nodes choose a new node tohost the configuration interface.

v The new configuration node initializes the configuration daemons, sshd and

httpd, and then binds the configuration IP interface to its Ethernet port.v The router is configured as the default gateway for the new configuration node.

v The new configuration node sends five unsolicited address resolution protocol(ARP) packets to the local subnet broadcast address. The ARP packets containthe cluster IP and the media access control (MAC) address for the newconfiguration node. All systems that receive ARP packets are forced to updatetheir ARP tables. Once the ARP tables are updated, these systems can connectto the new configuration node.

Note: Some Ethernet devices might not forward ARP packets. If the ARPpackets are not forwarded, connectivity to the new configuration nodecannot be established automatically. To avoid this problem, configure allEthernet devices to pass unsolicited ARP packets. You can restore lost

connectivity by logging into the SAN Volume Controller and starting asecure copy to the affected system. Starting a secure copy forces anupdate to the ARP cache for all systems connected to the same switch asthe affected system.

Ethernet link failures

If the Ethernet link to the SAN Volume Controller cluster fails because of an eventunrelated to the SAN Volume Controller itself, such as a cable being disconnectedor an Ethernet router failure, the SAN Volume Controller does not attempt to failoverthe configuration node to restore IP access to the cluster.

SAN fabric overviewThe SAN fabric is an area of the network that contains routers, gateways, hubs,and switches. A SAN is configured into a number of zones. A device using the SANcan only communicate with devices that are included in the same zones that it is in.A SAN Volume Controller cluster requires two distinct types of zones: a host zoneand a disk zone.

In the host zone, the host systems can identify and address the SAN VolumeController nodes. You can have more than one host zone and more than one diskzone. Generally, you create one host zone for each host type. In the disk zone, theSAN Volume Controller nodes identify the disk drives. Host systems cannot operateon the disk drives directly; all data transfer occurs through the SAN Volume

Controller nodes. Figure 2 on page 5 shows several host systems that areconnected in a SAN fabric.


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A cluster of SAN Volume Controller nodes is connected to the fibre-channel fabricand presents virtual disks (VDisks) to the host systems. You create these VDisksfrom units of space within a managed disk (MDisk) group. An MDisk group is acollection of MDisks that are presented by the storage systems (RAID controllers).The MDisk group provides a storage pool. You specify how each group is created,

and you can combine MDisks from different manufacturers’ controllers in the sameMDisk group. However, to optimize the use of resources, it is recommended that allMDisks in an MDisk group have similar performance characteristics.

Note: Some operating systems cannot tolerate other operating systems in thesame host zone, although you might have more than one host type in theSAN fabric. For example, you can have a SAN that contains one host thatruns on an IBM AIX ® operating system and another host that runs on aMicrosoft ® Windows ® operating system.

Cluster configuration information is stored on every SAN Volume Controller nodethat is in the cluster to allow concurrent replacement of field replaceable units(FRUs). You can remove one SAN Volume Controller node in each I/O group from a

cluster when hardware service or maintenance is required. After you remove theSAN Volume Controller node, you can replace the FRUs in the SAN VolumeController node. When a new FRU is installed and when the SAN Volume Controllernode is added back into the cluster, the configuration information that is required bythat SAN Volume Controller node is read from other SAN Volume Controller nodesin the cluster.

All communication between disk drives and all communication between SANVolume Controller nodes is performed through the SAN. All SAN Volume Controllernode configuration and service commands are sent to the cluster through anEthernet network.

Fibre Channel

Fabric

Host Host Host Host

.

.

.

RAID RAID RAID RAID. . .

Host zone

Disk zone

Node 1

Node 2

Node 3

Figure 2. Example of a SAN Volume Controller cluster in a fabric

Chapter 1. SAN Volume Controller overview 5

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Each SAN Volume Controller node contains its own vital product data (VPD). Eachcluster contains VPD that is common to all the SAN Volume Controller nodes in thecluster, and any system, with the correct access authority, that is connected to theEthernet network can access this VPD.

Service mode overview

The service mode allows you to access vital product data (VPD), logs, and dumpdata on the node. It also provides you with a method of forcing the installation of adifferent version of software.

A SAN Volume Controller is assigned two IP addresses. The first address is thecluster IP address that is used for all normal configuration and service activity. Thesecond address is not normally active; you can activate the second address for asingle SAN Volume Controller by setting it into service mode.

The cluster can only be accessed through its IP address when the SAN VolumeController nodes have formed into a cluster. If not enough cluster nodes can accesseach other through the fibre channel fabric or the node is not currently a member ofa cluster, the node is inaccessible through the cluster IP address. The normal repairprocedure for cluster access problems is to repair any faults on the fibre channelfabric and repair any nodes that are indicating failure conditions on their front paneldisplays. If, after performing these repair actions, it is still not possible to access thecluster, it might be necessary to enable service mode to help isolate or repair theproblem.

Note: Use service mode only under the direction of the IBM Support Center.Setting service mode for a node that is in an active cluster might cause datato be lost.

Service mode can be reset through the Web browser, command-line interface, or byturning the node off and back on.

Related reference“Recover cluster navigation” on page 145The Recover cluster? option is useful if the administrator password has been lost orforgotten.

“Service mode” on page 156While in service mode, you can use the front panel to view or change a serviceIPv4 or an IPv6 address. You can also view the version and build level of the SANVolume Controller software that is installed and active on the node.


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Chapter 2. Introducing the SAN Volume Controller hardwarecomponents

A SAN Volume Controller system consists of SAN Volume Controller nodes andrelated hardware components, such as uninterruptible power supply units and the

optional redundant ac-power switches. Note that nodes and uninterruptible powersupply units are installed in pairs.

SAN Volume Controller nodes

SAN Volume Controller supports five different node types.

The SAN Volume Controller 2145-8A4 and the SAN Volume Controller 2145-8G4models are currently available. In addition, the following models of SAN VolumeController nodes have been available in previous releases and are still supportedwith the latest SAN Volume Controller software:

v SAN Volume Controller 2145-8F4

v

SAN Volume Controller 2145-8F2v SAN Volume Controller 2145-4F2

A label on the front of the node indicates the SAN Volume Controller node type andserial number.

SAN Volume Controller front panel controls and indicatorsThe controls and indicators are used for power and navigation and to indicateinformation, such as system activity, service and configuration options, servicecontroller failures, and node identification.

SAN Volume Controller 2145-8A4 controls and indicatorsThe controls and indicators are used for power and navigation and to indicateinformation, such as system activity, service and configuration options, servicecontroller failures, and node identification.

Figure 3 shows the controls and indicators on the front panel of the SAN VolumeController 2145-8A4.

1 Operator-information panel

2 Cache LED

3 Front-panel display

4 Navigation buttons

s v c

0 0 4 3 8

1 2 3

8 7 6 5

4

Figure 3. SAN Volume Controller 2145-8A4 front-panel assembly

© Copyright IBM Corp. 2003, 2008 7

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5 Serial number label

6 Select button

7 Node identification label

8 Error LED

SAN Volume Controller 2145-8G4 controls and indicatorsThe controls and indicators are used for power and navigation and to indicateinformation, such as system activity, service and configuration options, servicecontroller failures, and node identification.

Figure 4 shows the controls and indicators on the front panel of the SAN VolumeController 2145-8G4.

1 Cache LED

2 Front panel display


4 Serial number label

5 Operator information panel

6 Select button


8 Error LED

SAN Volume Controller 2145-8F4 and SAN Volume Controller2145-8F2 controls and indicatorsThe controls and indicators are used for power and navigation and to indicateinformation, such as system activity, service and configuration options, service

controller failures, and node identification.

Figure 5 on page 9 shows the controls and indicators on the front panel of the SANVolume Controller 2145-8F4 and SAN Volume Controller 2145-8F2.

s v c

0 0 2 1 6

5

68

1 2 3

47

Figure 4. SAN Volume Controller 2145-8G4 front-panel assembly


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1 Cache LED



4

Serial number label5 Operator-information panel

6 Select button


8 Error LED

SAN Volume Controller 2145-4F2 controls and indicatorsThe controls and indicators are used for power and navigation and to indicateinformation, such as system activity, service and configuration options, servicecontroller failures, and node identification.

Figure 6 shows the controls and indicators on the front panel of the SAN VolumeController 2145-4F2.

SAN Volume Controller 2145-4F2 controls and indicators

1 Power button

2 Power LED

3 Check LED


5 Select button


s v c

0 0 0 7 5

5

68

1 2 3 4

7

Figure 5. SAN Volume Controller 2145-8F2 and SAN Volume Controller 2145-8F4 front-panel assembly

45

51 62 73 4

Figure 6. SAN Volume Controller 2145-4F2 front-panel assembly

Chapter 2. Introducing the SAN Volume Controller hardware components 9


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Cache LEDSystem activity is indicated through the green, cache LED.

The cache LED provides the following system activity indicators:

Off The node is not operating as a member of a cluster.On The node is operating as a member of a cluster.

FlashingThe node is dumping cache and state data to the local disk in anticipationof a system reboot (from a pending power-off action or other controlledrestart sequence). Do not remove the power cable or force a power-offaction while this LED is flashing.

Front-panel displayThe front-panel display shows service, configuration, and navigation information.

You can select the language that is displayed on the front panel. The display can

show both alphanumeric information and graphical information (progress bars).

The front-panel display shows configuration and service information about the SANVolume Controller node and the SAN Volume Controller cluster, including thefollowing items:

v Boot progress indicator

v Boot failed

v Charging

v Hardware boot

v Node rescue request

v Power failure

v

Powering offv Recovering

v Restarting

v Shutting down

v Error codes

v Validate WWNN?

Related reference

Chapter 5, “Using the front panel of the SAN Volume Controller,” on page 135The front panel of the SAN Volume Controller has a display, various LEDs,navigation buttons, and a select button that are used when servicing your SANVolume Controller node.

Navigation buttonsYou can use the navigation buttons to move through menus.

There are four navigational buttons that you can use to move throughout a menu:up, down, right, and left.

Each button corresponds to the direction that you can move in a menu. Forexample, to move right in a menu, press the navigation button that is located on theright side. If you want to move down in a menu, press the navigation button that islocated on the bottom.


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Note: The select button is used in tandem with the navigation buttons.

Product serial numberThe node contains a SAN Volume Controller product serial number that is written tothe system board hardware. The product serial number is also printed on the serialnumber label on the right side of the front panel.

This number is used for warranty and service entitlement checking and is includedin the data sent with error reports. It is essential that this number is not changedduring the life of the product. If the system board is replaced, you must follow thesystem board replacement instructions carefully and rewrite the serial number onthe system board.

SAN Volume Controller operator-information panelThe operator-information panel is located on the front panel of the SAN VolumeController.

SAN Volume Controller 2145-8A4 operator-information panel:

The operator-information panel contains buttons and indicators, such as the

power-control button, and LEDs that indicate information, such as system-boarderrors, hard-drive activity, and power status.

Figure 7 shows the operator-information panel for the SAN Volume Controller2145-8A4.

1 System-error LED (amber)

2 Location LED (blue)

3 Hard-disk drive activity LED (green)

4 Reset button

5 Power-control button

6 Power LED (green)

SAN Volume Controller 2145-8G4 operator information panel:

The operator-information panel contains buttons and indicators, such as the releaselatch for the light path diagnostics panel, the power-control button, and LEDs thatindicate information, such as system-board errors, hard-drive activity, and powerstatus.

123456

s v c

0 0 4 5 2

Figure 7. SAN Volume Controller 2145-8A4 operator-information panel



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Figure 8 shows the operator information panel for the SAN Volume Controller2145-8G4.

1 Release latch for light path diagnostics panel


3 System-information LED (amber)


5 Hard disk drive activity LED (green)

6 Power LED (green)

7 Power-control button

SAN Volume Controller 2145-8F4 and SAN Volume Controller 2145-8F2 operator information panel:

The operator-information panel contains buttons and indicators, such as the releaselatch for the light path diagnostics panel, the power-control button, and LEDs thatindicate information, such as system-board errors, hard-drive activity, and powerstatus.

Figure 9 shows the operator-information panel that is used by the SAN Volume

Controller 2145-8F4 and the SAN Volume Controller 2145-8F2 models.

1 Release latch for light path diagnostics panel


3 Information LED (amber)


5 Hard disk drive activity LED (green)

6 Power control button

1234567

s v c

0 0 2 1 5

Figure 8. SAN Volume Controller 2145-8G4 operator-information panel

5678 1234

s v c

0 0 0 8 4

Figure 9. SAN Volume Controller 2145-8F2 and SAN Volume Controller 2145-8F4 operator-information panel



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7 Power LED (green)

8 USB connector

System-error LED:

When it is lit, the system-error LED indicates that a system-board error has

occurred.

This amber LED lights up if the SAN Volume Controller hardware detects a fatalerror that requires a new field replaceable unit (FRU).

Note: If you have SAN Volume Controller model 2145-8A4, 2145-8G4, 2145-8F4,or 2145-8F2, see MAP 5800: Light path to help you isolate the faulty FRU.

A system-error LED is also at the rear of the SAN Volume Controller models2145-8G4, 2145-8F4, and 2145-8F2.

Hard-disk drive activity LED:

When it is lit, the green hard-disk drive activity LED indicates that the hard diskdrive is in use.

Reset button:

A reset button is available on the SAN Volume Controller 2145-8A4 node, but donot use it.

If you use the reset button, the node restarts immediately without the SAN VolumeController control data being written to disk. Service actions are then required tomake the node operational again.

Power control button:

The power control button turns on or turns off the main power to the SAN VolumeController.

To turn on the power, press and release the power control button. You must have apointed device, such as a pen, to press the button.

To turn off the power, press and release the power control button. For moreinformation about how to turn off the SAN Volume Controller node, see “MAP 5350:Powering off a SAN Volume Controller node” in the IBM System Storage SAN Volume Controller Troubleshooting Guide .

Notes:

1. When the node is operational and you press and immediately releasethe power control button, the SAN Volume Controller indicates on itsfront panel that it is turning off and writes its control data to its internaldisk. This can take up to five minutes. If you press the power controlbutton but do not release it, the node turns off immediately without theSAN Volume Controller control data being written to disk. Serviceactions are then required to make the SAN Volume Controlleroperational again. Therefore, during a power-off operation, do not pressand hold the power control button for more than two seconds.


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2. The 2145 UPS-1U does not turn off when the SAN Volume Controller isshut down from the power control button.

Power LED:

The green power LED indicates the power status of the SAN Volume Controller.

The power LED has the following properties:Off One or more of the following are true:

v No power is present at the power supply input.

v The power supply has failed.

v The LED has failed.

On The SAN Volume Controller node is turned on.

FlashingThe SAN Volume Controller node is turned off, but is still connected to apower source.

Note: A power LED is also at the rear of the SAN Volume Controller 2145-8F2,2145-8F4, and 2145-8G4 nodes.

Release latch:

The release latch on the SAN Volume Controller models 2145-8G4, 2145-8F4, and2145-8F2 gives you access to the light path diagnostics panel, which provides amethod for determining the location of a problem.

After pressing the release latch on the operator-information panel, you can slide thelight path diagnostics panel out to view the lit LEDs. The LEDs indicate the type oferror that has occurred. See MAP 5800: Light path for more detail.

To retract the panel, push it back into the node and snap it into place.Information-Error LED:

When the information-error LED is lit, a noncritical event has occurred.

Check the light path diagnostics panel and the error log. Light path diagnostics aredescribed in more detail in the light path maintenance analysis procedure (MAP).

Location LED:

The SAN Volume Controller does not use the location LED.

Select buttonYou can use the select button to select an item from a menu.

The select button and navigation buttons help you to navigate and select menu andboot options, and start a service panel test.

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Node identification labelThe node identification label on the front panel displays a six-digit nodeidentification number. Sometimes this number is called the panel name or frontpanel ID.

The node identification label is the six-digit number that is used in the svctask addnode command. It is readable by system software and is used by configuration

and service software as a node identifier. The node identification number can alsobe displayed on the front-panel display when node is selected from the menu.

If the service controller assembly front panel is replaced, the configuration andservice software displays the number that is printed on the front of the replacementpanel. Future error reports contain the new number. No cluster reconfiguration isnecessary when the front panel is replaced.

Error LEDCritical faults on the service controller are indicated through the amber, error LED.

The error LED has the following two states:

OFF The service controller is functioning correctly.ON A critical service-controller failure was detected and you must replace the

service controller.

Power buttonThe power button turns on or off the main power to the SAN Volume Controller2145-4F2.

To turn on the power, press and release the power button.

To turn off the power, press and release the power button. For a preferred methodof powering off, see “MAP 5350: Powering off a SAN Volume Controller node”.

Note: When the SAN Volume Controller is operational and you press andimmediately release the power button, the SAN Volume Controller indicateson its front panel that it is powering off and writes its control data to itsinternal disk. This can take up to five minutes. If you press the power buttonbut do not release it, an immediate power off occurs without the SANVolume Controller control data being written to disk. Service actions are thenrequired to make the SAN Volume Controller operational again. Therefore,during a power-off operation, do not press and hold the power button formore than two seconds.

Attention: The SAN Volume Controller 2145-4F2 node is the only SAN VolumeController model that is supported by the 2145 UPS. If a SAN Volume Controller

2145-4F2 is turned off for more than five minutes and it is the only SAN VolumeController 2145-4F2 that is connected to a 2145 UPS, the 2145 UPS also turns off.To turn on the SAN Volume Controller 2145-4F2, you must first turn on the 2145UPS to which it is connected.

Note: The 2145 UPS-1U does not turn off when the SAN Volume Controller nodeis shut down from the power button.

Check LEDThe amber check LED is used to indicate critical failures on the service controller.


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If the check LED is off and the power LED is on, the service controller is workingcorrectly.

If the check LED is on, a critical service controller failure was detected.

The check LED is also on while the service controller code is being reprogrammed.For example, when the SAN Volume Controller cluster code is being upgraded, the

check LED is on. It is normal for the power LED to be on at this time.

SAN Volume Controller rear panel indicators and connectorsThe rear panel indicators for the SAN Volume Controller are located on the backpanel assembly. The external connectors are located on the SAN Volume Controllernode and the power supply assembly.

SAN Volume Controller 2145-8A4 rear-panel indicatorsThe rear-panel indicators consist of LEDs that indicate the status of thefibre-channel ports, Ethernet connection and activity, power, electrical current, andsystem-board errors.

Figure 10 shows the rear-panel indicators on the SAN Volume Controller 2145-8A4back-panel assembly.

1

Fibre-channel LEDs2 Ethernet activity LED

3 Ethernet link LED

SAN Volume Controller 2145-8A4 connectorsThe external connectors consist of fibre-channel, serial and Ethernet ports, and thepower supply.

Figure 11 shows the external connectors on the SAN Volume Controller 2145-8A4back-panel assembly.

1 Fibre-channel port 1

Figure 10. SAN Volume Controller 2145-8A4 rear-panel indicators

Figure 11. SAN Volume Controller 2145-8A4 external connectors


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5 Power supply

6 Serial connection

7 Ethernet port 1

Figure 12 shows the type of connector that is located on the power supplyassembly. The connector enables you to connect the SAN Volume Controller2145-8A4 to the power source from the uninterruptible power supply.

SAN Volume Controller 2145-8A4 ports used during service procedures

The SAN Volume Controller 2145-8A4 contains a number of ports that are usedonly during service procedures. These ports are shown in Figure 13.

1 System management port

2 Four USB ports, two on the front and two on the rear

3 Ethernet port 24 One video port on the rear

During normal operation, none of these ports are used. Connect a device to any ofthese ports only when you are directed to do so by a service procedure or by yourIBM service representative.

SAN Volume Controller 2145-8A4 ports not used

The SAN Volume Controller 2145-8A4 has no unused ports.

Figure 12. Power connector

Figure 13. Service ports of the SAN Volume Controller 2145-8A4


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SAN Volume Controller 2145-8G4 rear panel indicatorsThe rear-panel indicators consist of LEDs that indicate the status of thefibre-channel ports, Ethernet connection and activity, power, electrical current, andsystem-board errors.

Figure 14 shows the rear panel indicators on the SAN Volume Controller 2145-8G4back panel assembly.

1 Fibre-channel LEDs

2 Ethernet activity LED

3 Ethernet link LED

4 Power, location, and system error LEDs

5 Ac and dc LEDs

SAN Volume Controller 2145-8G4 connectorsThe external connectors consist of fibre-channel, serial, and Ethernet ports, and thepower supply.

Figure 15 shows the external connectors on the SAN Volume Controller 2145-8G4back panel assembly.





5 Power supply

6 Serial connection

7 Ethernet port 1

s v c

0 0 2 2 5

3 42

5

1

Figure 14. SAN Volume Controller 2145-8G4 rear-panel indicators

s v c

0 0 2 2 1

1 3 42

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Figure 15. SAN Volume Controller 2145-8G4 external connectors



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Figure 16 shows the type of connector that is located on the power supplyassembly. The connector enables you to connect the SAN Volume Controller2145-8G4 to the power source from the uninterruptible power supply.

SAN Volume Controller 2145-8G4 ports used during serviceprocedures

The SAN Volume Controller 2145-8G4 contains a number of ports that are onlyused during service procedures. These ports are shown in Figure 17.

1 Ethernet port 2


3 Four USB ports, two on the front and two on the rear

4 Two monitor ports, one on the front and one on the rear

During normal operation, none of these ports are used. Connect a device to any ofthese ports only when you are directed to do so by a service procedure or by yourIBM service representative.

SAN Volume Controller 2145-8G4 ports not used

The SAN Volume Controller 2145-8G4 has no unused ports.

SAN Volume Controller 2145-8F4 rear panel indicatorsThe rear panel indicators are located on the back panel assembly.

Figure 18 on page 20 shows the rear panel indicators on the SAN VolumeController 2145-8F4 back panel assembly.

Ground

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1

s v c

0 0 2 2 7

2 34

3

Figure 17. Service ports of the SAN Volume Controller 2145-8G4



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2 Ethernet link LED


4 Ac and dc LEDs

SAN Volume Controller 2145-8F4 connectorsThe external connectors consist of Ethernet, serial, and fibre-channel ports, and thepower supply.

Figure 19 shows the external connectors on the SAN Volume Controller 2145-8F4back panel assembly.

1 Ethernet port 1

2 Serial connection



5

Fibre-channel port 36 Fibre-channel port 4

7 Power supply

Figure 20 on page 21 shows the type of connector that is located on the powersupply assembly. The connector enables you to connect the SAN Volume Controller2145-8F4 to the power source from the uninterruptible power supply.

s v c

0 0 1 9 1

1

2 3 4

Figure 18. SAN Volume Controller 2145-8F4 rear-panel indicators

s v c

0 0 1 7 1

5 6 7

1 2

3 4

Figure 19. SAN Volume Controller 2145-8F4 external connectors



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SAN Volume Controller 2145-8F4 ports used during service procedures

The SAN Volume Controller 2145-8F4 contains three service ports: Ethernet port 2,the keyboard port, and the monitor port. These ports are used only during serviceprocedures. Figure 21 provides the locations of the service ports.

1 Ethernet port 2

2 Keyboard port

3 Monitor port

SAN Volume Controller 2145-8F4 ports not used during normal

operation

The SAN Volume Controller 2145-8F4 is equipped with several ports that are notused by the SAN Volume Controller during normal operation. Figure 22 andFigure 22 show the ports that are not used by the SAN Volume Controller.


2 Ethernet port 2

3 Mouse port

4 Keyboard port

5 USB ports

Ground

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Neutral


s v c

0 0 2 1 1

1 2 3

Figure 21. Service ports of the SAN Volume Controller 2145-8F4

s v c

0 0 2 0 8

1 2 3 4 5 6

Figure 22. Ports not used during normal operation by the SAN Volume Controller 2145-8F4


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6 Monitor port

1 USB port

SAN Volume Controller 2145-8F2 rear panel indicatorsThe rear panel indicators are located on the back panel assembly.

Figure 24 shows the rear panel indicators on the SAN Volume Controller 2145-8F2back panel assembly.


2 Ethernet link LED


4 Ac and dc LEDs

SAN Volume Controller 2145-8F2 connectorsThe external connectors consist of the power supply and Ethernet, fibre-channel,and serial ports.

Figure 25 on page 23 shows the external connectors on the SAN Volume Controller

2145-8F2 back panel assembly.

1

s v c

0 0 2 1 0

Figure 23. Ports not used on the front panel of the SAN Volume Controller 2145-8F4

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3 42




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1 Power supply


3 Serial connection




7 Ethernet port 1

Figure 25 shows the type of connector that is located on the power supplyassembly. The connector enables you to connect the SAN Volume Controller2145-8F2 to the power source from the uninterruptible power supply.

Fibre-channel LEDsThe fibre-channel LEDs indicate the status of the fibre-channel ports.

The SAN Volume Controller models 2145-8A4, 2145-8G4, and 2145-8F4 use twofibre-channel LEDs per fibre-channel port, which are arranged one above the other.The LEDs are arranged in the same order as the ports.

The fibre-channel LEDs indicate the following link status.

Top row (link speed) Bottom row (link activity) Link status

Off Off InactiveOff On / Blinking Active 1 Gbps

Blinking On / Blinking Active 2 Gbps

On On / Blinking Active 4 Gbps

Note: Blinking indicates I/O activity.

s v c

0 0 0 7 6

567 1234


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Related reference

“Fibre-channel port numbers and worldwide port names” on page 28Fibre-channel ports are identified by their physical port number and by a worldwideport name (WWPN).

Ethernet activity LEDThe Ethernet activity LED indicates that the SAN Volume Controller 2145-8G4 or

SAN Volume Controller 2145-8A4 is communicating with the Ethernet network thatis connected to the Ethernet port.

The Ethernet activity LED is located on each Ethernet port; Ethernet port 2 is usedonly during Ethernet troubleshooting.

Ethernet link LEDThe Ethernet link LED indicates that there is an active connection on the Ethernetport.

The Ethernet link LED is located on each Ethernet port; however, only Ethernet port1 is used during normal operation.

Power, location, and system error LEDsThe power, location, and system error LEDs are housed together on the rear of theSAN Volume Controller next to the monitor port.

The following terms describe the power, location, and system error LEDs:

Power LEDThis is the top of the three LEDs and indicates the following states:

Off One or more of the following are true:

v No power is present at the power supply input

v The power supply has failed

v The LED has failed

On The SAN Volume Controller is powered on.

FlashingThe SAN Volume Controller is turned off but is still connected to apower source.

Location LEDThis is the middle of the three LEDs and is not used by the SAN VolumeController.

System-error LEDThis is the bottom of the three LEDs that indicates that a system boarderror has occurred. The light path diagnostics provide more information.

Ac and dc LEDsThe ac and dc LEDs indicate whether the node is receiving electrical current.

Ac LED

The upper LED 1 next to the power supply, indicates that ac current ispresent on the node.

Dc LED

The lower LED 2 next to the power supply, indicates that dc current ispresent on the node.



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Ac and dc LEDs on the SAN Volume Controller 2145-8G4:

The ac LED and dc LED are located on the rear of the SAN Volume Controller2145-8G4.

Figure 27 shows the location of the ac and dc LEDs.

Ac and dc LEDs on the SAN Volume Controller 2145-8F4 and the SAN Volume Controller 2145-8F2:

The ac LED and dc LED are located on the rear of the SAN Volume Controller2145-8F4 and the SAN Volume Controller 2145-8F2.

Figure 28 shows the location of the ac and dc LEDs.

1

2

s v c

0 0 2 2 0

Figure 27. SAN Volume Controller 2145-8G4 ac and dc LEDs

s v c

0 0 1 0 5

1

2

Figure 28. SAN Volume Controller 2145-8F4 and SAN Volume Controller 2145-8F2 ac and dc LEDs



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SAN Volume Controller 2145-4F2 rear panel indicatorsThe rear panel indicators consist of LEDs that indicate the status of the powersupply and Ethernet operation. They can also indicate system board errors.

Figure 29 shows the rear panel indicators on the SAN Volume Controller 2145-4F2back panel assembly.

1 System board power LED

2 System board fault LED

3 Monitor LED (not used)

4 Lower Ethernet link LED

5 Upper Ethernet link LED

System board power LED:

The system board power LED indicates the power supply status that is detected bythe system board.

System board fault LED:

The amber system board fault LED indicates that the system board has detected acritical failure.

You can view the system board fault LED in the documentation on the rear panel

indicators.

Monitor LED:

The green monitor LED is not used on the SAN Volume Controller.

You can view the monitor LED in the documentation concerning the rear panelindicators.

Lower Ethernet link LED:

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The lower Ethernet link LED indicates the operational status of Ethernet port 1. ThisLED is illuminated when a good Ethernet connection exists between the SANVolume Controller 2145-4F2 and the Ethernet network.

Upper Ethernet link LED:

The upper Ethernet link LED indicates the operational status of Ethernet port 2.

This LED is illuminated when a good Ethernet connection exists between the SANVolume Controller 2145-4F2 and the Ethernet network.

Ethernet port 2 is not used on the SAN Volume Controller.

SAN Volume Controller 2145-4F2 connectorsThe external connectors consist of the power supply and the fibre-channel,Ethernet, and serial ports.

Figure 30 shows the external connectors on the SAN Volume Controller 2145-4F2back panel assembly.

1 Power connector



4 Ethernet port 2

5 Ethernet port 1

6 Serial connector



Figure 31 on page 28 the type of connector that is located on the power supply

assembly. The connector enables you to connect the SAN Volume Controller2145-4F2 to the power source from the uninterruptible power supply.

21 3 4

5678




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Fibre-channel port numbers and worldwide port namesFibre-channel ports are identified by their physical port number and by a worldwideport name (WWPN).

The physical port numbers identify fibre-channel cards and cable connections whenyou perform service tasks. The WWPNs are used for tasks such as fibre-channel

switch configuration and to uniquely identify the devices on the SAN.

The WWPNs are derived from the worldwide node name (WWNN) of the SANVolume Controller node in which the card is installed.

The WWNN is in the form 50050768010XXXXX , where XXXXX is initially derivedfrom the unit and is specific to a SAN Volume Controller node. You can change theXXXXX value by using the front panel to facilitate service controller concurrentreplacement and to enable some concurrent upgrade operations.

The WWPNs are in the form 5005076801QXXXXX , where XXXXX is as previouslystated and Q is related to the port number as follows:

Port Value of Q1 4

2 3

3 1

4 2

Related reference

“Fibre-channel LEDs” on page 23The fibre-channel LEDs indicate the status of the fibre-channel ports.

SAN Volume Controller 2145-8A4 fibre-channel port numbers and

worldwide port namesThe physical port numbers are 1 - 4, counting from left to right when you view therear panel of the SAN Volume Controller 2145-8A4.

Figure 32 on page 29 identifies the fibre-channel port numbers on the SAN VolumeController 2145-8A4.

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SAN Volume Controller 2145-8G4 fibre-channel port numbers andworldwide port namesThe physical port numbers are 1 - 4, counting from left to right when you view therear panel of the SAN Volume Controller 2145-8G4.

Figure 33 provides a view of the rear of the SAN Volume Controller 2145-8G4.

SAN Volume Controller 2145-8F4 fibre-channel port numbers andworldwide port namesThe physical port numbers are 1 - 4, counting from left to right when you view therear panel of the SAN Volume Controller 2145-8F4.

Figure 34 provides a view of the rear of the SAN Volume Controller 2145-8F4.

SAN Volume Controller 2145-8F2 fibre-channel port nu

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