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  • It is not possible to take a FlashCopy onto a HyperSwap volume (the FlashCopy target cannot have the same redundancy the source volumes have)
  • Due to the restriction mentioned above, if a HyperSwap volume is the source of a FlashCopy, it is not possible to reverse the FlashCopy. This means:
    • The PowerHA STRSVCSSN command must specify RVSCNSGRP(*NONE). 
    • With the PowerHA CHGSVCSSN command, OPTION(*REVERSE) cannot be used

  • Similar to traditional MetroMirror, HyperSwap volumes have a master volume and an auxiliary volume. The master volume resides on one Storwzie control enclosure and the auxiliary volume is on the second control enclosure. PowerHA is only aware of the master volume a FlashCopy can only exist on the Stowize that contains the master volume.

    Note

    Attempting to start a FlashCopy where the master volume resides on one Storwize enclosure and the auxiliary volume resides on the second enclosure will result in an HAE2057: An error has been returned by the storage subsystem. The second level message text will contain the following error returned by the storage device:

    CMMVC8660E The Create FlashCopy mapping task cannot be initiated because the source volume is in an active-active relationship and the target volume and map are not in the same site as the source volume.