IBM System Storage DS3000, Programming Manual

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Deleting a Consistency Group Enhanced FlashCopy Image
When you delete an Enhanced FlashCopy consistency group the system performs the following actions:
v
Deletes all existing Enhanced FlashCopy images from the consistency group.
v
Deletes all existing Enhanced FlashCopy logical drives from the consistency group.
v
Deletes all the associated Enhanced FlashCopy images that exist for each member logical drive in the
consistency group
v Deletes all the associated Enhanced FlashCopy logical drives that exist for each member logical drive
in the consistency group
v
Deletes all associated repositories that exist for each member logical drive in the consistency group (if
selected).
To delete the Enhanced FlashCopy consistency group and its associated repositories, use this command:
delete consistencyGroup [consistencyGroupName] deleteRepositoryMembers=True;
To keep the repositories for later use, set the
deleteRepositoryMembers
parameter to False instead.
Optionally you can choose to keep a number of Enhanced FlashCopy images with these parameters:
v deleteCount
– This parameter deletes the oldest Enhanced FlashCopy image first and continues to
delete the oldest Enhanced FlashCopy images until reaching the number that you enter. If the number
that you enter is greater than the number of Enhanced FlashCopy images, then all of the Enhanced
FlashCopy images are deleted.
v retainCount
– This parameter keeps the most recent Enhanced FlashCopy images in the consistency
group.
If you have an Enhanced FlashCopy logical drive associated with the to-be-deleted Enhanced FlashCopy
images, you can choose to either stop the deletion operation or continue with the deletion anyway. To
continue with the deletion whether the Enhanced FlashCopy images have associated Enhanced
FlashCopy logical drives or not, set the
ignoreEnhancedFlashCopylogical drive
parameter to
TRUE
. To
stop the deletion when the Enhanced FlashCopy image has the associated Enhanced FlashCopy logical
drive, set the
ignoreEnhancedFlashCopylogical drive
parameter to
FALSE
. The default is
FALSE
. This
parameter applies only if the Enhanced FlashCopy image is associated with an Enhanced FlashCopy
logical drive.
Creating an Enhanced FlashCopy Image Logical drive
You create an Enhanced FlashCopy logical drive to provide host access to an Enhanced FlashCopy image
within an Enhanced FlashCopy group. A read-write Enhanced FlashCopy logical drive has its own
repository that is used to save any subsequent modifications made by the host application to the base
logical drive without affecting the referenced Enhanced FlashCopy image.
You create an Enhanced FlashCopy logical drive to provide host access to an Enhanced FlashCopy image
within an Enhanced FlashCopy group. A read-write Enhanced FlashCopy logical drive has its own
repository that is used to save any subsequent modifications made by the host application to the base
logical drive without affecting the referenced Enhanced FlashCopy image.
The Enhanced FlashCopy logical drive can be designated as either read-only or read-write.
v
A read-only Enhanced FlashCopy logical drive provides a host application with READ access to a copy
of the data contained in the Enhanced FlashCopy image, but without the ability to modify the
Enhanced FlashCopy image. A read-only Enhanced FlashCopy logical drive does not have an
associated repository.
v
A read-write Enhanced FlashCopy logical drive requires an associated repository to provide the host
application with WRITE access to a copy of the data contained in the Enhanced FlashCopy image.
Prerequisites
6-14
IBM System Storage DS3000, DS4000, and DS5000: Command Line Interface and Script Commands Programming Guide