HP P6000 Continuous Access Implementation Guide (T3680-96431, August 2012)

Table 7 HP P6000 Replication Solutions Manager display icons
DescriptionIconResource
Indicates that the array is in an abnormal state
and requires attention.
Array
Indicates a catastrophic failure and requires
immediate action.
Virtual disks
Red indicates a failure; yellow indicates that the
DR group is in a degraded state. Either condition
requires immediate attention.
DR groups
Disk group hardware failure on the source array
Scenario: A hardware failure on a source array causes a DR group to become inoperative.
NOTE: The operational state of the DR group at the source array will show as Failed ( );
on the destination array the DR group will show as Good ( ).
Action summary: If you plan to recover using data on the destination array, then fail over the
destination array (unplanned failover) and delete DR groups and virtual disks on the failed array.
Repair the failed disk group. Re-create DR groups, virtual disks, and host presentations. If the failed
source array was logging at the time of the hardware failure, you must recover using data at the
destination array (if you are running HP P6000 Continuous Access) or using a backup.
There are two ways to recover from a disk group hardware failure on the source array:
• If data replication was occurring synchronously when the source disk group became inoperative,
the data at the destination array is current and I/O consistent. Fail over on the destination
array after performing the proper resolution process at the failed array as described in the
following procedure. Repair the inoperative disk group and re-create the DR groups. Copy
data from the destination array to the repaired source.
• If your disk group becomes inoperative when the DR groups are logging or while in enhanced
asynchronous write mode, the data is not current, but still I/O consistent on the destination
array. Stale data is not as current as the data on the source array. If you prefer to use stale
data for recovery, the steps are the same as if replication were occurring normally.
Procedure:
Perform the following steps when a disk group hardware failure occurs on the source array and
the data on the destination array is current:
1. Check to determine if the DR groups were logging or merging.
2. From HP P6000 Command View, navigate to each DR group on the destination array and
fail over, if possible, if immediate access to the data is required. See “Unplanned failover”
(page 108)).
3. Using HP P6000 Command View to manage the failed (previous source) array, navigate to
the failed disk group.
A list of failed virtual disks and DR groups is displayed.
114 Failover and recovery