IBM System Storage DS3000, Programming Manual

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The Enhanced FlashCopy premium feature must be enabled on the local storage subsystems.
Guidelines
Keep these guidelines in mind when creating an Enhanced FlashCopy logical drive:
v
You cannot create an Enhanced FlashCopy logical drive of a Failed base logical drive.
v Enhanced FlashCopy repositories are fully resize-able. If you have the storage capacity you can
increase the size of the Enhanced FlashCopy repository to avoid a repository full message. Conversely,
if you find that the Enhanced FlashCopy repository is larger than you need, you can reduce its size to
free up space that is needed by other logical drives.
v
If you create an Enhanced FlashCopy logical drive for an Enhanced FlashCopy image and that
Enhanced FlashCopy image creation operation remains in a Pending state it is due to the following
conditions:
– The base logical drive that contains this Enhanced FlashCopy image is a member of an Enhanced
Global Mirror Group AND
– The base logical drive is currently in a synchronizing operation. The Enhanced FlashCopy image
creation will complete as soon as the synchronization operation is complete.
v
The Enhanced FlashCopy logical drive repository must have the same T10PI and Quality of Service
(QoS) settings as the associated base logical drive. For example, if a base logical drive that is used for
an Enhanced FlashCopy logical drive is T10PI enabled, then each repository logical drive in the overall
repository must be T10PI enabled.
Creating an Enhanced FlashCopy Logical drive
To create a read-only Enhanced FlashCopy logical drive for the oldest enhanced FlashCopy image of the
Enhanced FlashCopy group
SG_05
using the default Enhanced FlashCopy logical drive repository drive
settings, use this command:
create enhancedFlashCopyLogicalDrive userLabel="enhFlashCopyLDName"
enhancedFlashCopyImageID="SG_05:oldest" readOnly;
To create a read-write Enhanced FlashCopy logical drive for the newest enhanced FlashCopy image of the
Enhanced FlashCopy group
SG_05 using the default Enhanced FlashCopy logical drive repository drive
settings, use this command:
create enhancedFlashCopyLogicalDrive userLabel="enhFlashCopyLDName"
enhancedFlashCopyImageID="SG_05:newest";
Restarting a Consistency Group Enhanced FlashCopy Image Logical
drive
If an Enhanced FlashCopy logical drive has entered a Stopped state, this cause the Enhanced FlashCopy
logical drive to become inaccessible for read or write operations. The Enhanced FlashCopy logical drive is
also detached from the Enhanced FlashCopy with which it was previously associated. The Enhanced
FlashCopy logical drive still remains logically bound to the associated base logical drive.
To restart an Enhanced FlashCopy logical drive that has entered a Stopped state, use this command:
resume cgEnhancedFlashCopyLogicalDrive ["
enhancedFlashCopyLogicalDriveName"]
cgEnhancedFlashCopyImage="enhancedFlashCopyImageName"
When you run this command, you must identify the Consistency Group Enhanced FlashCopy logical
drive and the consistency group Enhanced FlashCopy image used.
Chapter 6. Using the Enhanced FlashCopy Images Premium Feature
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