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