Compaq AA-RHGWB-TE manual Cabling an HSZ20 in a Cluster using External Termination

Figure 9–13: Externally Terminated Shared SCSI Bus with HSZ50 RAID Array Controllers at Bus End

Network

Member

System

1

Memory Channel

KZPSA-BB (ID 6)

Memory

Channel

Interface

Member

System

2

Memory Channel

KZPSA-BB (ID 7)

T		3
					1
1	4	3	4	3
2
2	T

HSZ50

Controller A

HSZ50

Controller B

ZK-1597U-AI

Table 9–3 shows the components used to create the cluster shown in Figure 9–12 and Figure 9–13.

Table 9–3: Hardware Components Used for Configuration Shown in Figure 8–12 and Figure 8–13

Callout Number	Description
1	BN21W-0B Y cable
2	H879-AA terminator
3	BN21K (or BN21L) cablea b
4	H885-AA trilink connector

aThe maximum combined length of the BN21K (or BN21L) cables must not exceed 25 meters.

bThe cable between the H885-AA trilink connectors on the HSZ50s could be a BN21L-0B, a 0.15-meter cable.

9.4.3.2Cabling an HSZ20 in a Cluster using External Termination

To connect a SWXRA-Z1 (HSZ20 controller) to a shared SCSI bus, follow these steps:

1.Referring to the RAID Array 310 Deskside Subsystem (SWXRA-ZX) Hardware User’s Guide, open the SWXRA-Z1 cabinet, locate the SCSI bus converter board, and:

• Remove the five differential terminator resistor SIPs.

Configurations Using External Termination or Radial Connections to Non-UltraSCSI Devices 9–27