Asynchronous Notifications; Interoperation With Metro Mirror And Global Mirror - IBM Storwize V5010 Manual

Path Offline for the source volume
If a FlashCopy mapping is in the copying state and the source volume goes path offline, this
path offline state is propagated to all target volumes up to, but not including, the target volume
for the newest mapping that is 100% copied but remains in the copying state. If no mappings
are 100% copied, all of the target volumes are taken offline. Path offline is a state that
exists on a per-node basis. Other nodes might not be affected. If the source volume comes
online, the target and source volumes are brought back online.
Path Offline for the target volume
If a target volume goes path offline but the source volume is still online, and if there are any
dependent mappings, those target volumes also go path offline. The source volume remains
online.

10.3.16 Asynchronous notifications

FlashCopy raises informational event log entries for certain mapping and Consistency Group
state transitions. These state transitions occur as a result of configuration events that
complete asynchronously. The informational events can be used to generate Simple Network
Management Protocol (SNMP) traps to notify the user.
Other configuration events complete synchronously, and no informational events are logged
as a result of the following events:
PREPARE_COMPLETED
This state transition is logged when the FlashCopy mapping or Consistency Group enters
the prepared state as a result of a user request to prepare. The user can now start (or
stop) the mapping or Consistency Group.
COPY_COMPLETED
This state transition is logged when the FlashCopy mapping or Consistency Group enters
the idle_or_copied state when it was in the copying or stopping state. This state
transition indicates that the target disk now contains a complete copy and no longer
depends on the source.
STOP_COMPLETED
This state transition is logged when the FlashCopy mapping or Consistency Group enters
the stopped state as a result of a user request to stop. It is logged after the automatic copy
process completes. This state transition includes mappings where no copying needed to
be performed. This state transition differs from the event that is logged when a mapping or
group enters the stopped state as a result of an I/O error.

10.3.17 Interoperation with Metro Mirror and Global Mirror

A volume can be part of any copy relationship (FlashCopy, Metro Mirror, or Remote Mirror).
Therefore, FlashCopy can work with Metro Mirror and Global Mirror to provide better
protection of the data.
For example, we can perform a Metro Mirror copy to duplicate data from Site_A to Site_B and
then perform a daily FlashCopy to back up the data to another location.
Note: If a volume is set to Transparent Cloud Tiering function, it cannot be part of
FlashCopy, Metro Mirror, or Remote Mirror.
Chapter 10. Copy services
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