Technical data

4.9 Setting the Device Unit Number and Verifying Valid
Boot Devices
This section covers the remaining steps you must complete before you install
the Tru64 UNIX and TruCluster Server software:
1. Set the device unit number of the disk where you will install the base
operating system software, and set the device unit number of the first
cluster member boot disk. Setting the device unit number allows the
console and installation scripts to recognize the disks (see Section 4.9.1).
2. Verify that the console recognizes these disks as valid boot devices (see
Section 4.9.2).
4.9.1 Set the Device Unit Number
The device unit number is a subset of the device name as shown in
a show device console display. For example, in the device name
dga101.1001.0.7.0, the device unit number is 101 (as in dga101). The
console uses this device unit number to identify a storage unit. When you
set a device unit number, you are really setting an alias for the device
worldwide name (WWN, also called the worldwide ID, WWID). The 128-bit
WWN is too large to be used as the device unit number, so an alias is used
instead. The 128-bit WWN is labeled Device Identifier in an MSA1000
SHOW UNIT display.
This section describes how to use the wwidmgr -quickset command to set
the device unit number for the Fibre Channel disks to be used as the Tru64
UNIX installation disk or cluster member system boot disks.
To set the device unit number for a Fibre Channel device, follow these steps:
1. From Table A-2, obtain the unit ID for the virtual disk to be used as the
Tru64 UNIX installation disk or cluster member system boot disks. The
example installation uses the information in Table 4-2. The unit ID is
referred to as the user-defined identifier (UDID) for the console software
and WWID manager (wwidmgr).
For example, in Table 4-2 the Tru64 UNIX disk has a unit ID of 101.
The unit ID for the cluster member 1 boot disk is 106, and the cluster
member 2 boot disk is 107.
2. From the AlphaServer console, use the wwidmgr -clear all
command to clear the stored Fibre Channel wwid1, wwid2, wwid3,
wwid4, N1, N2, N3, and N4 console environment variables. You want to
start with all wwid
n and Nn variables clear.
A console initialization is generally required before you can use the
wwidmgr command. For example:
4-22 Preparing the MSA1000 for TruCluster Server Use