IBM Support

Global Mirror Relationships With Change Volumes Must Be Stopped Before Reading From Secondary Volumes

Technote (troubleshooting)


Problem(Abstract)

When using Global Mirror with Change Volumes, ensure that the relationship is stopped before attempting to perform read I/O to the secondary volume, either from a host or by starting a FlashCopy. This will ensure that the data read from the secondary volume is consistent.

Resolving the problem

This restriction applies to 6.3.0.x software levels only. Version 6.4.0.0 and later provide a consistent image on the secondary volume while the relationship is in the 'consistent_copying' state, removing the requirement to stop the relationship before performing read I/O.

Cross reference information
Segment Product Component Platform Version Edition
Storage Virtualization SAN Volume Controller 6.3 SAN Volume Controller 6.3
Disk Storage Systems IBM Storwize V7000 Unified (2073) 1.3 Platform Independent 1.3

Document information

More support for: IBM Storwize V7000 (2076)
6.3

Version: 6.3

Operating system(s): IBM Storwize V7000

Reference #: S1003947

Modified date: 05 December 2013


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