Technical data

Table 10–5: Hardware Components Used in the TruCluster Server
Configuration Shown in Figure 10–14, Figure 10–15, and Figure 10–16
Callout Number
Description
1
H879-AA terminator
2
BN21W-0B Y cable
3
BN21K (BN21L or BN31G) HD68 cable
a
4
BN38C HD68 to VHDCI cable
a
5
BN37A-0E 50-centimeter (19.7-inch) VHDCI cable
b
a
The maximum length of the SCSI bus segment, including the combined length of BN38C (or
BN38E-0B/BN37A combination), BN21K (BN21L or BN31G), and BN37A cables and internal device length,
must not exceed 25 meters (82 feet).
b
The BN37A-0E cable is used only in the TruCluster Server configuration shown in Figure 10–16. It is not
used in the configurations shown in Figure 10–14 or Figure 10–15.
Figure 10–17 shows an externally terminated TruCluster Server
configuration with a RA3000 controller shelf in the middle of the shared
SCSI bus. In this configuration, because the Host 0 I/O module is
daisy-chained to the Host 1 I/O module, dual HSZ22 controllers could use
active/active or active/passive failover.
Figure 10–17: Externally Terminated TruCluster Server Configuration with
a Mid-bus RA3000 Controller Shelf with Active/Active or Active/Passive
Failover
AlphaServer
Member
KZPBA-CB
System 2
AlphaServer
Member
KZPBA-CB
System 1
T
1 2
3
T
2
1
3
Host 0 I/O
Module
Host 1 I/O
Module
Host
In
Host
Out
Host
In
Host
Out
RAID Array 3000
Controller Shelf
4
ZK-1484U-AI
Cluster Interconnect
Table 10–6 lists the components used to create the cluster shown in
Figure 10–17.
Configurations Using External Termination or Radial Connections to
Non-UltraSCSI Devices 10–33