Specifications

7–27
Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide
ADD UNIT
Creates a logical unit from a device, container, or partition. The controller maps all
requests from the host to the logical-unit number as requests to the container specified
in the ADD UNIT command.
If you add a newly-created storageset or disk to your subsystem, you must initialize it
before it can be added as a logical unit. If you are adding a storageset or disk that has
data on it that you want to maintain, do not initialize it; it will be added as logical unit.
Syntax
ADD UNIT unit-number container-name
Parameters
unit-number
IMPORTANT: Once you change to the SCSI-3 version in OpenVMS operating
systems for multiple-bus failover, you must use a special number called a
unit
identifier
, which makes the unit visible to the host. See the IDENTIFIER switch
with the command “SET unit-number,” page 7–126 for more information.
Assigns a number to the unit being created from a device, container, or partition in the
subsystem. The host uses this number to indicate the source or target for every I/O
request it sends to the controller. The unit-number is a host-addressable LUN. The
unit-number is assigned to one of the host ports.
Unit numbers are 0-199 and are prefixed by one of the following:
■ Transparent failover mode:
❏ D0 to D99—assigns units to Port 1
❏ D100 to D199—assigns units to Port 2
■ Multiple-bus failover mode:
❏ D0 to D199—assigns units on both ports