Technical data

Figure 10–12 shows two AlphaServer systems in a TruCluster Server
configuration with dual-redundant HSZ50 RAID controllers in the middle
of the shared SCSI bus. Note that the SCSI bus adapters are KZPSA-BB
PCI-to-SCSI adapters. They could be KZPBA-CB host bus adapters without
changing any cables.
Figure 10–12: Externally Terminated Shared SCSI Bus with Mid-Bus HSZ50
RAID Array Controllers
KZPSA-BB (ID 7)
Network
Memory
Channel
Interface
Memory Channel
KZPSA-BB (ID 6)
Memory Channel
Member
System
2
Member
System
1
2
1
1
2
T
T
3
4
3
3
4
HSZ50
Controller A Controller B
HSZ50
ZK-1596U-AI
Table 10–3 lists the components that are used to create the cluster that is
shown in Figure 10–12 and Figure 10–13.
Figure 10–13 shows two AlphaServer systems in a TruCluster Server
configuration with dual-redundant HSZ50 RAID controllers at the end of
the shared SCSI bus. As with Figure 10–12, the SCSI bus adapters are
KZPSA-BB PCI-to-SCSI adapters. They could be KZPBA-CB host bus
adapters without changing any cables.
Configurations Using External Termination or Radial Connections to
Non-UltraSCSI Devices 10–27