HP P6000 Replication Solutions Manager User Guide (T3680-96089, October 2012)

Transition from synchronous to asynchronous
• The source DR group log cannot be Logging or Merging, and the destination DR group must
be available.
• On the source and destination arrays, the disk groups specified for the logs must accommodate
the log's maximum size.
• The DR group pair cannot be suspended, failsafe enabled, or performing a full copy. See
Suspension, Failsafe mode, and Full copy.
Transition from asynchronous to synchronous
• The DR group pair cannot be suspended.
• The DR group log (with basic asynchronous) cannot be logging.
• The transition from enhanced asynchronous does not occur until the source DR group log is
run down (merged) to the destination.
• During a transition, the log is run down or merged to the destination and host I/O is
automatically throttled. See I/O throttling. The merging may cause an apparent delay in
completing the transition, but is expected behavior.
94 DR groups