Changing the device configuration refers to any of the following:
Mount name change
Change from File System operation to RawDevice operation
Capacity change of partitions (mainly for re-creation of LUN mapping)
Start position for change of partitions (mainly for re-creation of LUN mapping)
Change the device configuration by using the following procedure. This processing is executed for all volumes on the disk containing the volume whose device configuration is to be changed.
Check whether there is a transaction volume on the target disk that needs to be backed up. If there is, delete the transaction volume. For information on this, refer to "3.6.2.1 Deleting a transaction volume".
Check whether a backup volume exists in the target disk. If it does, delete the backup volume. For information on this, refer to "3.6.2.2 Deleting a backup volume".
Change the device configuration.
Because the post-change device configuration needs to be reflected in the AdvancedCopy Manager data set, execute device information change processing. Refer to "3.4.4 Fetching device information on a Managed Server", for details on changing the device information.
Reset the deleted transaction or backup volume in the backup. Refer to "3.4.6 Setting the operation type for a device", for details on adding the transaction volume or backup volume.
Point
If the device configuration is changed (in step 3 above) before the transaction and backup volumes are deleted (in steps 1 and 2), history information cannot be deleted, and synchronized backup processing cannot be cancelled. This could possibly prevent the deletion of the transaction and backup volumes.
In this case, set the emergency operational mode, and delete the history information or cancel synchronized backup processing.
For details of the emergency operational mode, refer to the section describing swsthistdel (History information deletion command) and swstcancelsync (Backup synchronous processing cancel command).
Change the device configuration as shown below. This processing applies to all the volumes on a disk whose device configuration is to be changed.
Check whether there are any replication volumes on the target disk. If there are, delete them. For information about this, refer to "6.6.2 Deleting a source volume or replica volume".
Change the device configuration.
Because the post-change device configuration needs to be reflected in the AdvancedCopy Manager data set, execute device information change processing for AdvancedCopy Manager. Refer to "6.4.4 Fetching device information on a Managed Server", for details about changing the device information.
Reset a deleted replica volume in the replication operation. Refer to "6.4.5 Configuring the source volume and replica volume", for details about adding the replica volume.
Point
If the device configuration is changed (in step 2 above) before the replication volumes are deleted (in step 2), replication processing cannot be cancelled. This could possibly prevent the deletion of the replication volumes.
In this case, set the emergency operational mode, and cancel replication processing.
For details on the emergency operational mode, refer to the section describing swsrpcancel (Replication cancellation command).
