Hitachi G1000 - Limitations When Sharing GAD and Shadowimage Volumes; SI Operations and GAD Pair Status

Note:
• Pairs in an SI consistency group must reside in the same storage system.
Because of this, the SI pairs that are associated with both the GAD P-VOL
and the S-VOL cannot be registered to the same consistency group.
• When you use GAD pair volumes to create an SI pair, you must specify
the physical LDEV ID, not the virtual LDEV ID.
Related topics
•
Limitations when sharing GAD and ShadowImage volumes on page 2-8
• SI operations and GAD pair status on page 2-8
• GAD operations and SI pair status on page 2-11
Limitations when sharing GAD and ShadowImage volumes
When a GAD pair is deleted with the P-VOL specified, the virtual LDEV ID of
the S-VOL is deleted. If you delete the pair with the S-VOL specified, the
virtual LDEV ID of the P-VOL is deleted. When the virtual LDEV ID is deleted,
the server does not recognize the volume.
Any operation that deletes the virtual LDEV ID of a volume used as a
ShadowImage volume cannot be performed.
SI operations and GAD pair status
The ability to perform a ShadowImage pair operation depends on the SI pair
status and GAD pair status. The following tables show SI pair operations and
whether they can be performed (Yes, No) with the listed GAD status. The
information assumes the required SI status for the operation.
2-8
System requirements
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide