HP ESA10000 User Manual download pdf (Page 20)

RA7000 / ESA10000 High Availability Solution Kit for HP-UX

1–6 EK–HAHPU–MH. B01

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.

1.5 Prepare 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

Adapter

Illustrated

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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HP ESA10000 User Manual Page 20