IBM XIV Gen3 Storage System

Release Notes for version 11.4.1.aSecond edition

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Contents

Release Notes . . . . . . . . . . . . 1What's new in IBM XIV software version 11.4.1.a . . 1Availability of code load . . . . . . . . . . 1Availability of Host Attachment Kits (HAK) . . . . 1Limitations . . . . . . . . . . . . . . . 2Fixed issues . . . . . . . . . . . . . . 2

SYS-263289 . . . . . . . . . . . . . . 2SYS-263345 . . . . . . . . . . . . . . 3SYS-263452 . . . . . . . . . . . . . . 3SYS-263825 . . . . . . . . . . . . . . 3

SYS-262008 . . . . . . . . . . . . . . 3Known issues . . . . . . . . . . . . . . 4

SYS-263438 . . . . . . . . . . . . . . 4SYS-263482 . . . . . . . . . . . . . . 4

Copyrights . . . . . . . . . . . . . . . 4Definitions of problem severity . . . . . . . . 4Contacting IBM Support . . . . . . . . . . 5Documentation format . . . . . . . . . . . 5Notices and trademarks . . . . . . . . . . 5

© Copyright IBM Corp. 2013, 2014 iii

iv IBM XIV Gen3 Storage System: Release Notes for version 11.4.1.a Second edition

Release Notes

These Release Notes are for IBM XIV Gen3 Storage System Version 11.4.1.a.

Release date30 Dec 2013

What's new in IBM XIV software version 11.4.1.aIBM XIV software version 11.4.1.a for IBM XIV Storage System Gen3 is amaintenance release, delivering bug fixes as later described in this document.

Compatible Management Tools releases:This microcode version is compatible with Management Tools 4.3.0 or later.

Availability of code loadHardware

Version 11.4.1.a is only available for Gen3 hardware.

SoftwareThis version supports hot upgrade from:v 11.4.1v 11.3.1v 11.3.0.av 11.3.0v 11.2.0.cv 11.2.0.bv 11.2.0.av 11.1.1v 11.1.0.b

Technician Assistant ToolThe upgrade requires Technician Assistant Tool (TA) version 4.8 or above.

DocumentationRefer to Preparing for code load on the Information Center. This topicdetails the steps required from the customer in order to prepare for thecode load. http://publib.boulder.ibm.com/infocenter/ibmxiv/r2/topic/com.ibm.help.xiv.doc/xiv_po_11_1_02.html

Availability of Host Attachment Kits (HAK)IBM XIV Host Attachment Kit

The latest IBM XIV Host Attachment Kit (HAK) version can bedownloaded from the IBM Fix Central website: http://www.ibm.com/support/fixcentral

IBM Storage Host Software Solutions Information CenterFor detailed usage information, refer to the IBM Storage Host SoftwareSolutions Information Center: http://publib.boulder.ibm.com/infocenter/strhosts/ic.

© Copyright IBM Corp. 2013, 2014 1

Limitations1. IBM Hyper-Scale Mobility applies to systems located within the same data

center.2. Using Hyper-Scale Mobility to mobilize volumes that are mapped to Unix or

Linux hosts, and are backed-up using IBM Tivoli Storage FlashCopy Managerversion 3.2 or earlier, is not supported.

3. IBM Hyper-Scale Mobility cannot be applied directly on a volume that belongsto a consistency group. Before such a volume can be moved using IBMHyper-Scale Mobility, it must be removed from the consistency group.

4. IBM Hyper-Scale Mobility does not apply to volume snapshots. When themigration is changed to proxy state, all snapshots of the pertinent migratedvolume are deleted automatically.

5. IBM Hyper-Scale Mobility does not migrate a volume that is in a mirroringrelationships. Before a volume can be moved using IBM Hyper-Scale Mobility,its mirroring relationship must be deleted.

6. Using Hyper-Scale Mobility to mobilize volumes that are mapped to WindowsServer hosts, and are backed-up using Microsoft Volume Shadow Copy Service,with IBM XIV Provider for Microsoft Windows Volume Shadow Copy Service(VSS) version 2.3.2 or earlier, is not supported.To use Hyper-Scale Mobility in this case, IBM XIV Provider for MicrosoftWindows Volume Shadow Copy Service (VSS) version 2.4.0 or later must beinstalled.

Note: IBM Tivoli Storage FlashCopy Manager for Windows is relying onMicrosoft Volume Shadow Copy Service. To use Hyper-Scale Mobility with IBMTivoli Storage FlashCopy Manager for Windows, IBM XIV Provider forMicrosoft Windows Volume Shadow Copy Service (VSS) version 2.4.0 or latermust be installed.

7. Using Hyper-Scale Mobility to mobilize volumes that are mapped to WindowsServer hosts, and are protected by IBM Storage Enabler for Windows FailoverClustering version 1.1.0 or earlier, is not supported.To use Hyper-Scale Mobility in this case, IBM Storage Enabler for WindowsFailover Clustering version 1.2.0 or later must be installed.

Additional information may be available from the respective release notes of theproducts mentioned in the limitations:1. For IBM Tivoli Storage FlashCopy Manager for Unix and Linux please refer to

release notes of version 4.1 or later.2. For IBM XIV Provider for Microsoft Windows Volume Shadow Copy Service

release notes, please refer to: http://pic.dhe.ibm.com/infocenter/strhosts/ic/topic/com.ibm.help.strghosts.doc/vss-homepage.html.

3. For IBM Storage Enabler for Windows Failover Clustering, release notes, pleaserefer to: http://pic.dhe.ibm.com/infocenter/strhosts/ic/index.jsp?topic=%2Fcom.ibm.help.strghosts.doc%2Fmscs-homepage.html.

Fixed issues

SYS-263289An XIV Gen3 system upgraded to code version 11.3.x or higher, using iSCSIconnectivity and SSD caching, may hit a memory depletion condition when

2 IBM XIV Gen3 Storage System: Release Notes for version 11.4.1.a Second edition

maintenance tools (such as XRAY) are run on the modules. This condition mayhave impact on various system management functions and in rare cases could leadto loss of access.

Severity:High impact

Affected version:11.3.0 and up

SYS-263345Data access (FC & iSCSI) to an Interface module may break if more than 350 activeconnections are defined to one of the module's FC ports.

Severity:High impact

Affected version:11.3.0 and up

SYS-263452When changing a pool from thin provisioned to thick provisioned (or vice versa),or when a pool usage threshold (maximum number of volumes and snapshots is12000) has been crossed, data access (FC & iSCSI) of an interface module maybreak.

Severity:High impact

Affected version:11.2.0 and up

SYS-263825On systems equipped with Solid State Drives (SSDs) and the Data-at-Rest Encryptionfeature is enabled, incorrect data (i.e., data that has not been decrypted) may bereturned when a Read operation is attempted immediately after a SCSI Write Samecommand to the same location.

This issue does not affect either systems that do not employ SSDs or systemsequipped with SSDs where the encryption feature is disabled.

Severity:High impact

Affected version:11.4.1

SYS-262008Changing the host type using the special_type_set XCLI command, (or with GUIprior to version 4.3) to type=hpux while volumes are mapped to it could lead to aloss of access.

Severity:High impact

Affected version:11.2.x, 11.3.x

Release Notes 3

Known issues

SYS-263438After 4377 Hyper-Scale Mobility migrations, the maximum number of volumes in asystem (12,000) will decrease by 1 volume with each new migration.

Severity:Moderate

Affected version:11.3.0 and up

SYS-263482The following new behaviour is not documented on the XCLI Reference Guide.Starting from release 11.4.1.a, application administrators can execute the followingcommands:v mirror_list

v schedule_list

v sync_job_list

Severity:Service

Affected version:11.4.1.a

Copyrights© Copyright IBM Corporation 2014. US Government Users Restricted Rights - Use,duplication or disclosure restricted by GSA ADP Schedule Contract with IBMCorp.

References in this documentation to IBM® products, programs, or services do notimply that IBM intends to make these available in all countries in which IBMoperates. Any reference to an IBM product, program or service is not intended tostate or imply that only IBM's product, program or service may be used. Anyfunctionally equivalent product, program or service that does not infringe any ofIBM's intellectual property rights may be used instead of the IBM product,program or service. Evaluation and verification of operation in conjunction withother products, except those expressly designated by IBM, are the user'sresponsibility.

Definitions of problem severityThe following definitions denote issues severity:

High impact

v Acute / Serious

– Acute - An irrecoverable error with potential loss of data.– Serious - An irrecoverable error with potential loss of access to data.

v HYPER - An high impact problem that is pervasive: 3 or moreoccurrences.

ModerateA function not operational and/or performance might be degraded.

4 IBM XIV Gen3 Storage System: Release Notes for version 11.4.1.a Second edition

ServiceA recoverable error (no impact) and service improvement.

ImprovementsChanges made for the purpose of better usability and serviceability.

Contacting IBM SupportThe release is supported via:

Voice callsWill come into Level 1 or Front Line Support as they do for the currentproduct.

Customers will use the appropriate support phone number for theirrespective countries; refer to the World Wide Directory for the supportnumbers by country. http://www.ibm.com/planetwide

Documentation formatThe publications for this product are in Adobe Portable Document Format (PDF)and should be compliant with accessibility standards.

If you experience difficulties when you use the PDF files and want to request aweb-based format or accessible PDF document for a publications, send a requestby email to starpubs@us.ibm.com. In the request, be sure to include the IBMpublication number and title.

When you sent information to IBM, you grant IBM a nonexclusive right to use todistribute the information in any way it believes appropriate without incurring anyobligation to you.

Notices and trademarksNotices

INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THISPUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHEREXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIEDWARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY OR FITNESSFOR A PARTICULAR PURPOSE. Some jurisdictions do not allow disclaimer ofexpress or implied warranties in certain transactions, therefore, this statement maynot apply to you. This information could include technical inaccuracies ortypographical errors. Changes are periodically made to the information herein;these changes will be incorporated in new editions of the publication. IBM maymake improvements and/or changes in the product(s) and/or the program(s)described in this publication at any time without notice.

Trademarks

Linux is a trademark of Linus Torvalds in the United States, other countries, orboth. Microsoft, Windows, and Windows Server are trademarks of MicrosoftCorporation in the United States, other countries, or both. Intel, Intel logo, IntelInside, Intel Inside logo, Intel Centrino, Intel Centrino logo, Celeron, Intel Xeon,Intel SpeedStep, Itanium, and Pentium are trademarks or registered trademarks ofIntel Corporation or its subsidiaries in the United States and other countries. Othercompany, product, or service names may be trademarks or service marks of others.

Release Notes 5

THIRD-PARTY LICENSE TERMS AND CONDITIONS, NOTICESAND INFORMATION

The license agreement for this product refers you to this file for details concerningterms and conditions applicable to third party software code included in thisproduct, and for certain notices and other information IBM must provide to youunder its license to certain software code. The relevant terms and conditions,notices and other information are provided or referenced below. Please note thatany non-English version of the licenses below is unofficial and is provided to youfor your convenience only. The English version of the licenses below, provided aspart of the English version of this file, is the official version. Notwithstanding theterms and conditions of any other agreement you may have with IBM or any of itsrelated or affiliated entities (collectively "IBM"), the third party software codeidentified below are "Excluded Components" and are subject to the following termsand conditions:v the Excluded Components are provided on an "AS IS" basisv IBM DISCLAIMS ANY AND ALL EXPRESS AND IMPLIED WARRANTIES

AND CONDITIONS WITH RESPECT TO THE EXCLUDED COMPONENTS,INCLUDING, BUT NOT LIMITED TO, THE WARRANTY OFNON-INFRINGEMENT OR INTERFERENCE AND THE IMPLIEDWARRANTIES AND CONDITIONS OF MERCHANTABILITY AND FITNESSFOR A PARTICULAR PURPOSE

v IBM will not be liable to you or indemnify you for any claims related to theExcluded Components

v IBM will not be liable for any direct, indirect, incidental, special, exemplary,punitive or consequential damages with respect to the Excluded Components.

6 IBM XIV Gen3 Storage System: Release Notes for version 11.4.1.a Second edition

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