HP StorageWorks Continuous Access EVA Administrator Guide (T3687-96043, December 2005)

If applies:
normal to
failsafe
CXO8066A
Loss of destination in
failsafe mode
Change
failsafe to
normal
Resume
host I/O
If applies:
throttle I/O
Merge or
full copy
when
destination
available
Figure 9 Resumption of operation if unable to access destina tio n in failsafe mode
Procedure:
1. Change affected source D R groups from failsafe-enabled m ode to normal mode.
2. If necessar y, issue operating system commands to the local hosts to restart I/O on the virtual disks
that were failsafe-locked. See Resuming I/O after failover.
3. To control the merging of data at the destination, suspend replication on the less important DR
groups. This forces the controllers to replic ate the most important data first when the links to the
destination are re-established. For more information, see Throttling merge I/O after logging.
NOTE:
If DR groups are suspended for an extended time, the log can be overrun. Restoring the
connection to the destination array will initiate a full copy of these DR groups. During the
full copy, the data will be inconsistent at the destination.
4. When connections to the destination are re-established and merging is complete, change DR g roups
from normal mode to failsafe-enabled mode, if desired.
NOTE:
If source DR groups start a full copy, you can enable failsafe mode.
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