HSG80 ACS Solution Software Version 8.7 for Compaq OpenVMS Installation and Configuration Guide

FC Configuration Procedures
5–24 HSG80 ACS Solution Software Version 8.7 for Compaq OpenVMS Installation and
Configuration Guide
Assigning Unit Identifiers
One unique step is required when configuring storage units for OpenVMS: specifying
an identifier (or LUN ID alias) for each unit. A unique identifier is required for each
unit (virtual disk). This identifier must be unique in the cluster.
This section gives two examples of setting an identifier for a previously created unit:
one using CLI and one using SWCC. The CLI uses the older terms “identifier” and
“unit”, while SWCC uses the terms “LUN ID alias” and “virtual disk”.
Identifier = LUN ID alias
Unit = virtual disk
Using CLI to Specify Identifier for a Unit
The command syntax for setting the identifier for a previously created unit (virtual
disk) follows:
SET UNIT_NUMBER IDENTIFIER=NN
NOTE: It is strongly suggested that, for simplicity, the identifier match the unit number. For
example, to set an identifier of 97 for unit D97, use the following command:
SET D97 IDENTIFIER=97
Using SWCC to Specify LUN ID Alias for a Virtual Disk
Setting a LUN ID alias for a virtual disk is the same as setting a unit identifier. To set
the LUN ID alias for a previously created virtual disk, perform the following
procedure:
1. Open the storage window, where you see the properties for that virtual disk.
2. Click on the Settings Tab to see changeable properties.
3. Click on the Enable LUN ID Alias button.
4. Enter the LUN ID alias (identifier) in the appropriate field. It is strongly suggested
that, for simplicity, the LUN ID alias match the virtual disk number.
NOTE: If, while using the StorageWorks HBA, you create a unit after your server is online, you
must run the SaveCfg command to see the unit.