Table9–1: Hardware Components Used forConfiguration Shown in Figure
8–9 and Figure 8–10
Callout Number Description
1BN21W-0B Y cable
2H879-AA terminator
3BN21K (or BN21L) cablea
4H885-AA trilink connector
aThemaximum combined length of the BN21K (or BN21L) cables must not exceed 25 meters.
9.4.2.2 Connecting TwoBA356s for Shared SCSI Bus Usage
When you use two BA356 storage shelves on a shared SCSI bus in a
TruClusterconfiguration, one BA356 must be configured for SCSI IDs 0
through 6 and the other configured for SCSI IDs 8 through 14.
Toprepare two BA356 storage shelves for shared SCSI bus usage (see
Figure 9–10), follow these steps:
1. Complete the steps of Section 9.4.1.2 for each BA356. Ensure that the
personality module address switches on one BA356 are set to select
SCSIIDs 0 through 6, and that the address switches on the other BA356
personality module are set to select SCSI IDs 8 through 14.
2. Ifeither of theBA356 storage shelves will be on the end of the SCSI bus,
attach an H879-AA terminator to theH885-AA trilink on the DWZZB
for the BA356 that willbe on the end of the bus.
3. Connect a BN21K or BN21L cable between the H885-AA trilinks.
4. When the KZPSA-BB or KZPBA-CB host bus adapters have been
installed:
•If the BA356 storage shelves are on the end of the shared SCSI bus,
connect a BN21K (or BN21L) cable between the BN21W-0B Y cables
on the host bus adapters. Connect another BN21K (or BN21L) cable
between the BN21W-0B Y cable with an open connector and the
H8855-AA trilink (on the BA356) with an open connector.
•If the BA356s are inthe middle of the shared SCSI bus, connect a
BN21K (or BN21L) cable between the BN21W-0B Y cable on each
host bus adapterand theH8855-AA trilink on a BA356 storage shelf.
Figure 9–10 shows a two member TruCluster Server configuration using two
BA356s for storage.
9–20 ConfigurationsUsing ExternalTermination or Radial Connections toNon-UltraSCSI Devices