Compaq AA-RHGWB-TE manual Memory

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

	Network
Member		Member
System	Memory		System
1		2
	Channel
	Interface
Memory Channel		Memory Channel
Host Bus Adapter (ID 6)		Host Bus Adapter (ID 7)

Tru64

UNIX

Disk

HSZ70 HSZ70

StorageWorks

RAID Array 7000

ZK-1589U-AI

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.

1–14Introduction