4–20Configuring Storagesets

Finding the CCL Location

To see where each CCL is located, use the following commands:

SHOW THIS_CONTROLLER

or

SHOW OTHER_CONTROLLER

Look under host port to find the Command Console LUN location. Because the CCL is not an actual device or unit, the SHOW UNITS command will display only unit information and no CCL locations.

Multiple-Port and Multiple-Host Use

The way the host sees the CCL varies, depending whether you are in SCSI-2 or SCSI- 3 mode and whether you’ve enabled transparent or multiple-bus failover modes,

SCSI-2 Mode

If you are in SCSI-2 mode and have enabled the SET FAILOVER command, only one CCL will be enabled. However, in SCSI-2 mode with SET MULTIBUS_FAILOVER enabled, all ports will see the CCL and will be able to access it. In addition, the CCL appears to the host as a direct access device.

SCSI-3 Mode

In SCSI-3 mode, a CCL will appear at LUN 0 of each target ID. If you are in transparent failover mode, each CCL will be accessible from the port that has the SCSI target ID enabled. Ports with multiple target IDs enabled will have multiple CCLs, and they will appear to the host as an array controller.

If you are in multiple-bus failover mode, all ports will see the CCLs and will be able to access them. As a result, all hosts will have access to each CCL, and they will appear to the host as array controllers.

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Compaq HSZ80 manual Finding the CCL Location, Multiple-Port and Multiple-Host Use, SCSI-2 Mode, SCSI-3 Mode