Compaq TruCluster Server AA-RHGWB-TE, Manual

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HSZ70. The array controllers can be configured as a dual redundant pair. If
you want the capability to fail over from one controller to another controller,
you must install the second controller. Also, you must set the failover mode.
Figure 1–6: Cluster Configuration with HSZ70 Controllers in Transparent
Failover Mode
Member
System
1
Network
Memory
Channel
Interface
Member
System
2
Memory Channel
Tru64
UNIX
Disk
ZK-1589U-AI
Host Bus Adapter (ID 7)
Member
System
1
Host Bus Adapter (ID 6)
Memory Channel
HSZ70 HSZ70
StorageWorks
RAID Array 7000
In Figure 1–6 the HSZ40, HSZ50, HSZ70, HSZ80, or HSG80 has transparent
failover mode enabled (
SET FAILOVER COPY = THIS_CONTROLLER
). In
transparent failover mode, both controllers are connected to the same shared
SCSI bus and device buses. Both controllers service the entire group of
storagesets, single-disk units, or other storage devices. Either controller can
continue to service all of the units if the other controller fails.
______________________ Note _______________________
The assignment of HSZ target IDs can be balanced between the
controllers to provide better system performance. See the RAID
array controller documentation for information on setting up
storagesets.
1–14 Introduction