source of an existing remote mirror and copy source volume. This allows
you to create full or incremental point-in-time copies at a local site and
then use remote mirroring commands to copy the data to the remote site.
Fast reverse
Reverses the FlashCopy relationship without waiting for the finish of the
background copy of the previous FlashCopy. This option applies to the
Global Mirror mode.
Inhibit writes to target
Ensures that write operations are inhibited on the target volume until a
refresh FlashCopy operation is complete.
Multiple Incremental FlashCopy
Allows a source volume to establish incremental flash copies to a
maximum of 12 targets.
Multiple Relationship FlashCopy
Allows a source volume to have multiple (up to 12) target volumes at the
same time.
Persistent FlashCopy
Allows the FlashCopy relationship to remain even after the FlashCopy
operation completes. You must explicitly delete the relationship.
Refresh target volume
Refresh a FlashCopy relationship, without recopying all tracks from the
source volume to the target volume.
Resynchronizing FlashCopy volume pairs
Update an initial point-in-time copy of a source volume without having to
recopy your entire volume.
Reverse restore
Reverses the FlashCopy relationship and copies data from the target
volume to the source volume.
Reset SCSI reservation on target volume
If there is a SCSI reservation on the target volume, the reservation is
released when the FlashCopy relationship is established. If this option is
not specified and a SCSI reservation exists on the target volume, the
FlashCopy operation fails.
Remote Pair FlashCopy
Figure 11 on page 71 illustrates how Remote Pair FlashCopy works. If
Remote Pair FlashCopy is used to copy data from Local A to Local B, an
equivalent operation is also performed from Remote A to Remote B.
FlashCopy can be performed as described for a Full Volume FlashCopy,
Incremental FlashCopy, and Dataset Level FlashCopy.
The Remote Pair FlashCopy function prevents the Metro Mirror
relationship from changing states and the resulting momentary period
where Remote A is out of synchronization with Remote B. This feature
provides a solution for data replication, data migration, remote copy, and
disaster recovery tasks.
Without Remote Pair FlashCopy, when you established a FlashCopy
relationship from Local A to Local B, by using a Metro Mirror primary
volume as the target of that FlashCopy relationship, the corresponding
Metro Mirror volume pair went from “full duplex” state to “duplex
pending” state if the FlashCopy data was being transferred to the Local B.
70 DS8880 Introduction and Planning Guide
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