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

Planned/
Unplanned
Loss of source
storage system
Verify
normalization
complete,
then stop
host I/O
Planned
Failover
If applies:
failsafe to
normal
Unplanned
Throttle I/O or
stop replication?
Start host
I/O
No
Yes
Options:
- Remain failed over at destination
- Fail over to preferred or home storage system
- Fail over to new hardware
CXO8065b
Issue
SUSPEND
commands
If applies:
Activate
another server
If possible:
Stop host
I/O
If applies:
Activate
another server
Figure 8 Planned and unplanned transfer of operations
TIP:
In the replication manager, you can designate a Home array to identify the preferred source. By default, the
source array at the time the DR group is created is Home. As the role of the array changes after multiple
failover and failback events, the Home designation persists.
Procedure:
1. If desired, move storage managem ent to another ma nagement server. For instructions, see HP
Command View EVA user guide.
2. Ensure that all DR groups are resumed and fully normalized.
Check DR group status using H P Command View EVA or HP Replication Solutions Manager. If a DR
group is merging or a full copy is in progress, wait for the process to complete.
3. Stop all host I/O on the source array.
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Failover and recovery