HP RA7000 manual Prepare the Scsi Host Adapters, Set Unique Scsi Host Adapter IDs

RA7000 / ESA10000 High Availability Solution Kit for HP-UX

Use Table 1-3 to select the basic cluster layout that best suits your environment. Prepare and install the SCSI host adapters into your servers (as described in Section 1.5, “Prepare the SCSI Host Adapters”). Then, reference Chapter 2, – Cabling the RAID Subsystem Cluster Components, to proceed with the basic cluster installation.

1.5Prepare the SCSI Host Adapters

Each of the host servers in the RAID subsystem cluster requires at least one supported SCSI host adapter be installed. (Expanding a cluster with a second RAID subsystem requires two SCSI host adapters per server). Prior to installing the SCSI host adapter(s) into each server, as described in your HP Host Adapter installation and service guide, you must prepare each one for a cluster environment. This involves two main steps:

∙Setting a unique SCSI host adapter ID

∙(For Mid-Bus RAID and End-Bus RAID cluster layouts only) Removing the resistor packs (terminators) on-board the SCSI host adapter

The procedures for setting unique SCSI host adapter IDs and removing resistor packs from the SCSI host adapters are contained in the following sections. As you perform these steps, reference the figure that corresponds to your SCSI host adapter model, as follows:

SCSI Host	Illustrated
Adapter	In
A28696A	Figure 1-1
A2969A	Figure 1-2
A4107A	Figure 1-3

1.5.1 Set Unique SCSI Host Adapter IDs

It is mandatory that each server in a cluster have a unique SCSI host adapter ID (target ID). The default setting of a SCSI host adapter ID is 7. One of the hosts in the cluster can maintain this ID. Typically, the SCSI IDs for each added server should decrease one number from 7, (6, 5, 4, etc.), to ensure that an unused device number is selected for the server ID.

Use the dip switch on-board the SCSI host adapter(s) to manually set the SCSI host adapter ID on each host server in the cluster to an unused number. (Two host adapters in the same server can have the same SCSI ID, as long as the adapters are not on the same SCSI bus). Reference the Figure for your SCSI host adapter model to locate the SCSI ID dip switch pack.

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