HP P6000 Continuous Access Software - Manual (Page 94)

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