HP 9000 rp5405 Servers - Manual (Page 240)

Workflow refer-
ence
Procedure using the Change Pair Status Wizard Scenario
Takeover: 1
To switch work to the secondary site, execute an ad-
vanced takeover operation. The secondary volume on
the secondary site is changed to a writable Split (SSWS)
status.
Primary site storage failure (no
loss of primary site data)
Takeback: 1
Execute a takeover-recovery (resync) operation to change
the secondary site volume to the primary volume and the
primary site volume to the secondary volume, and copy
the data on the secondary site volume to the primary site
volume. To move the application to the primary site, ex-
ecute an advanced swap operation. The secondary site
volume becomes the secondary volume, and the primary
site volume becomes the primary volume.
Recovering from a primary site
storage failure
Takeover: 1
To switch the application to the secondary site, execute
an advanced takeover operation. The status of the sec-
ondary volume on the secondary site is changed to Split
(SSWS).
Primary site damage (loss of
primary site data)
Takeback: 1
Reconstruct the copy pair from the secondary volume by
executing a takeover-recovery (recreate) operation. To
move work to the primary site, execute an advanced
swap operation. The secondary site volume becomes
the secondary volume, and the primary site volume be-
comes the primary volume.
Recovery from primary site
damage
Takeover: 4
To make the P-VOL on the primary site available, execute
an advanced force-split operation. This makes the
primary volume writable.
Forced takeover
Takeback: 4
To return the remote copy pair to a normal pair status,
change the remote copy pair to Sync status by executing
a basic resync operation. Disabling forced takeover status
(when data on secondary site
is not lost)
Takeback: 4
Because data on the secondary site is not available, the
basic resync function cannot be used to recover the re-
mote copy pair. Therefore, you must perform a basic
delete operation, followed by a basic create operation
to change the remote copy pair to Sync status.
Disabling forced takeover status
(when data in secondary site is
lost)
Takeover: 6
No takeover is necessary, because the primary volume
on the primary site is available. However, the pair status
for copy pair is disabled.
Failure on a secondary site
storage or RC line
Takeback: 6
Change the remote copy pair to Sync status by executing
a basic resync operation. Recovery from failure ona sec-
ondary site storageor RC line
Figure 6 describes the operations during a takeover. The numbers 1-5 in the figure correspond to the
continuation points in Figure 7 . This allows you to trace a recovery procedure from the takeover stage
to the takeback portion.
Managing pair life cycle 240