Compaq AA-RHGWC-TE Setting the KZPBA-CB Scsi ID, Example 4-7 Setting the KZPBA-CB Scsi Bus ID

4.3.3.2 Setting the KZPBA-CB SCSI ID

After you determine the console environment variables for the KZPBA-CBs on the shared SCSI bus, use the set console command to set the SCSI ID. For a TruCluster Server cluster, you will most likely have to set the SCSI ID for all KZPBA-CB UltraSCSI adapters except one. And, if you are using a DS-DWZZH-05, you will have to set the SCSI IDs for all KZPBA-CB UltraSCSI adapters.

______________________ Notes ______________________

You will have problems if you have two or more SCSI adapters at the same SCSI ID on any one SCSI bus.

If you are using a DS-DWZZH-05, you cannot use SCSI ID 7 for a KZPBA-CB UltraSCSI adapter; SCSI ID 7 is reserved for DS-DWZZH-05 use.

If DS-DWZZH-05 fair arbitration is enabled, The SCSI ID of the host adapter must match the SCSI ID assigned to the hub port. Mismatching or duplicating SCSI IDs will cause the hub to hang.

SCSI ID 7 is reserved for the DS-DWZZH-05 whether fair arbitration is enabled or not.

Use the set console command as shown in Example 4–7 to set the SCSI ID. In this example, the SCSI ID is set for KZPBA-CB pkc on the AlphaServer DS20 shown in Example 4–5.

Example 4–7: Setting the KZPBA-CB SCSI Bus ID

P00>>> show pkc0_host_id

7

P00>>> set pkc0_host_id 6

P00>>> show pkc0_host_id

6

4.3.3.3 KZPBA-CB Termination Resistors

The KZPBA-CB internal termination is disabled by removing the termination resistors RM1-RM8, as shown in Figure 4–1.

TruCluster Server System Configuration Using UltraSCSI Hardware 4–17