that can be linked with FlashCopy, see “Prerequisites for the Compatible FlashCopy linkage
configuration” (page 55).
• Compatible FlashCopy linkage when the copy pair is in the DUPLEX status (Continuous Access
Synchronous Z or Continuous Access Journal Z)
• Compatible FlashCopy linkage using the Preserve Mirror function when the copy pair is in
the DUPLEX status (Continuous Access Synchronous Z)
• Compatible FlashCopy linkage after placing the copy pair in the suspend status (Continuous
Access Synchronous Z, Continuous Access Journal Z, or Continuous Access Asynchronous)
Compatible FlashCopy Linkage When the Copy Pair Is in the DUPLEX Status
The following figure shows the flow of operations when Compatible FlashCopy copy pairs are
combined with Cnt Ac-S Z or Cnt Ac-J Z copy pairs in the DUPLEX status.
Before Compatible FlashCopy execution
During execution of Compatible FlashCopy
When Compatible FlashCopy is executed, the Cnt Ac-S Z or Cnt Ac-J Z copy pair is in the PENDING
status during copying.
After Compatible FlashCopy terminates
When Compatible FlashCopy terminates, the copy pair returns to the DUPLEX status.
Using Compatible FlashCopy linkage configurations 279
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