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Preserve Mirror FlashCopy z/OS DFSMSdss Storage Administration SC23-6868-01 |
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You can choose to allow the target volume of a FlashCopy® operation to be a Peer-to-Peer Remote Copy (PPRC) primary device. When the tracks associated with the FlashCopy relationship are copied to the PPRC secondary device, the PPRC (Metro Mirror) pair goes into a duplex pending state, to ensure the integrity of the mirror between the local site and the remote site. When the FlashCopy operation completes, the PPRC_SYNC volume pair returns to full duplex state. IBM® Remote Pair FlashCopy (also known as Preserve Mirror) mirrors the FlashCopy command that is issued at the local site, to the remote site. This allows FlashCopy operations to occur to PPRC primary volumes without affecting the PPRC duplex state. When you specify the FCTOPPRCPrimary keyword on the COPY command, you are requesting that DFSMSdss allows a PPPRC primary volume to become the target volume of the FlashCopy operation. You can specify the following sub-keywords to indicate whether the PPRCP mirror is allowed to go to duplex pending state if the target volume of the FlashCopy operation is a metro mirror primary device:
Note: If the target volume of FlashCopy operation
is not a metro mirror primary volume, then the FCTOPPRCPrimary keyword
has no effect on the FlashCopy operation.
For more information about Peer-to-Peer Remote Copy (PPRC) and metro mirror operation, refer to z/OS DFSMS Advanced Copy Services. For more information about the FCTOPPRCPrimary keyword on the COPY command, refer to COPY Command for DFSMSdss. |
Copyright IBM Corporation 1990, 2014
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