Technical data

use LSM to mirror the quorum or the member system boot disks, we do not
have a no-single-point-of-failure (NSPOF) cluster.
1.5.4 Using Hardware RAID to Mirror the Quorum and Member
System Boot Disks
You can use hardware RAID with any of the supported RAID array
controllers to mirror the quorum and member system boot disks. Figure 1–6
shows a cluster configuration using an HSZ70 RAID array controller. An
HSZ40, HSZ50, HSZ80, HSG60, or HSG80, or RAID array 3000 (with HSZ22
controller) can be used instead of the 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, HSG60, 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
1–14 Introduction