Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Compaq Tru64 UNIX Installation and Configuration Guide

Planning a Subsystem 1–11
The CCL does the following:
■ Allows the RAID Array to be recognized by the host as soon as it is attached to the
SCSI bus and configured into the operating system.
■ Serves as a communications device for the HS-Series Agent. The CCL identifies itself
to the host by a unique identification string.
In dual-redundant controller configurations, the commands described in the following
section alter the setting of the CCL on both controllers. The CCL is enabled only on host
port 1. At least one storage device of any type must be configured on host port 2 before
installing the Agent on a host connected to host port 2.
Select a storageset that you plan to configure and that is not likely to change. This
storageset can be used by the Agent to communicate with the RAID Array. Deleting this
storageset (LUN) breaks the connection between the Agent and the RAID Array.
Determining the Address of the CCL
The CCL is enabled by default. Its address can be determined by entering the following
CLI command:
HSG60 > SHOW THIS_CONTROLLER
Enabling/Disabling the CCL in SCSI-2 Mode
Enabling the CCL
To enable the CCL, enter the following CLI command:
HSG60 > SET THIS_CONTROLLER COMMAND_CONSOLE_LUN
Disabling the CCL
To disable the CCL, enter the following CLI command:
HSG60> SET THIS_CONTROLLER NOCOMMAND_CONSOLE_LUN
To see the state of the CCL, use the SHOW THIS CONTROLLER/ OTHER
CONTROLLER command. Because the CCL is not an actual LUN, the SHOW UNITS
command will not display the CCL location.