Storage Area

Network

(SAN)

Fundamentals

iSCSI EMC CX3-10

Major featuresFront view

Enclosure backplane and chasis hot-plug drives

The Vault

The first five drives of any CLARiiON hold a special area known as the vault. The cache is dumped (written at high speed) into the vault if a failure threatens the systems ability to protect cache. Thus vault disk have less usable space than other drives, and any drive bound in a RAID group that uses a vault disk is similary re-duced in capicity.

Disk IDs

Hard drives are identified by:

Bus + Enclosure + Disk

RAID Groups

An association of 2 to 16 drives. All disks in a RAID group share the same RAID type. LUNS are partitioned from the RAID group and span all disks in the RAID group.

Logical Unit Num-ber (LUN)

Hosts access storage us-ing logical unit number, which are exported by a SCSI target. The actual storage object is a logi-cal unit (LU), but invari-ably LUs are referred to as LUNs.

metaLUN

A virtual LUN object built bt striping or con-catentating multiple LUN objects. A CLARiiON base feature.

metaLUN 1metaLUN 2metaLUN 22 & 23

metaLUN 3

metaLUN 4

metaLUN 5

LOAD02H:\ ML1, L996, L997I:\ L17J:\ L19K:\ L7

L:\ L25

IT02H:\ L10I:\ L12J:\ L22K:\ L29

L:\ ML4, L987, L988, L989

Storage Groups

Major featuresRear view

Storage Processor (SP)

Navisphere view of SP A and B

SP Management Ports

Disk Array Loop

Power and UPS Manage-ment

Storage Processor En-closures (SPE)

LED Indicators

PRI and EXP

Power Distri-bution Units(PDU)

iSCSI connections

iSCSI VLAN on SwitchSAN to Servers

Server iSCSI connection

sNIC, HBA, TOE Chip

NIC Order and Bindings

Configuring iSCSI con-nection in Windows