B Initializing Volumes For Command Devices For The Xp1024/Xp128 Disk Array; Command Device Settings - HP XP P9500 Software User's Manual

B Initializing volumes for command devices for the
XP1024/XP128 Disk Array
For the XP1024/XP128 disk arrays, once the volumes allocated for command devices are ready,
the command devices need to be initialized. The procedure for initializing a command device is
explained below. These procedures are not needed for the P9500, XP24000/XO2000, or
XP12000/XP10000 disk arrays. You can use command devices by changing to offline.

Command device settings

All volumes to be used as command devices must have the identical track format, capacity, and
emulation type.
To initialize the volume for the command device:
1. Initialize 550 cylinders of the volume.
2. Allocate the VTOC so that it can be stored in cylinder 0.
3. Allocate a command device protection dataset to the command device and catalog the dataset.
Starting at cylinder 1, allocate 8,235 tracks of the command device protection dataset
consecutively. Ensure that the dataset size does not exceed the volume size (specifying the
ABSTR subparameter enables the dataset to be consecutively allocated to the appropriate
tracks).
Command device protection dataset name:
prefix.COMDEV.identifier.dad-id
prefix: Same as the prefix used by Business Continuity Manager (prefix set in Configuration
File Prefix in the Set Defaults panel).
identifier: The first four characters of the identifier are APID and the latter four characters
are the APID (hexadecimal number of 0000 to FFFF) assigned when the command device is
created. The value is specified when the route list is defined with a storage system attribute.
dad-id: Device Address Domain ID defined in the host that executes the YKBLDCMD
command.
If the command device protection dataset name allocated to the command device is duplicated
in the catalog, add any qualifier to the lower level.
If BCM.COMDEV.APID0001.NY is duplicated, specify the following:
BCM.COMDEV.APID0001.NY.NO1
BCM.COMDEV.APID0001.NY.NO2
Figure 138 Command device allocation
Command device settings 589