HP XP Racks - Manual (Page 236)

takeover-recovery operation depend on the options specified, so you must check the copy pair status
and select the options accordingly. The table below lists the options for the takeover-recovery operation
and the status of the target copy pairs.
Table 12 Operations and target copy pair states for takeover-recovery
Target copy pair
state
Description Operation
S-VOL P-VOL
Split (SS-
WS)
Not Sim-
plex
(SMPL)
Switches and synchronizes the primary and sec-
ondary volumes.
takeover-recovery (resync)
Split (SS-
WS) Simplex
(SMPL) Recreates the copy pair from the secondary
volume.
takeover-recovery (recreate)
CAUTION:
Note the following:
• Use of takeover-recovery (resync) operation is only permitted when the S-VOL copy pair state is
Split (SSWS), regardless of the P-VOL state.
• The takeover-recovery (recovery) operation is only permitted in the following cases:
- When the P-VOL copy pair state is Simplex (SMPL) and the P-VOL copy pair state is Split (SSWS)
- When the S-VOL copy pair state is Simplex (SMPL) regardless of the P-VOL copy pair state
The takeover-recovery procedure is as follows:
1. Using the Change Pair Status Wizard, create a takeover-recovery Change Copy Pair Status task
for the target copy group or copy pair.
2. Check the Task List window to confirm that the status of the task is Success.
3. Check the copy pair status in the Pair Configurations view.
Advanced recovery use cases
The following table lists the use cases for advanced recovery procedures and includes references to
the diagrams in
Figure 6 and Figure 7 .
Table 13 Advanced recovery scenarios and procedures
Workflow refer-
ence
Procedure using the Change Pair Status Wizard Scenario
Takeover: 3
To switch an application to the secondary site, execute
an advanced swap operation. The volume at the second-
ary site becomes the primary volume, and the volume
at the primary site becomes the secondary volume. Per-
form work on the secondary site while work server
maintenance is carried out on the primary site.
Performing maintenance on the
primary site work server
Managing pair life cycle 236