HP Surestore E Disk Array XP256 HP XP P9000 External Storage Access Manager Us - Page 61

Secondary system recovery, Recovering the system when the P-VOL is receiving host updates

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1. Verify that the P-VOL has the latest data by opening the Pair Operation window on the secondary storage system (S-VOL side) and checking that the VOL Access column is empty (blank). 2. On the secondary storage system, release the ESAM pairs. 3. On the secondary storage system, delete the quorum disk ID. 4. Format the quorum disk. 5. On the primary storage system, register the ESAM secondary storage system to the primary storage system. 6. On the primary and secondary storage systems, add the quorum disk. 7. On the primary storage system, create the ESAM pair. 8. On both the primary and secondary storage systems, make sure that Type shows ESAM. 9. Vary the owner and non-owner paths online using the multipath software. 10. Restart host I/O. Secondary system recovery There are two procedures you can use to recover the system after a power failure that results in the initialization of the system memory. The procedure you use depends on whether or not host I/O updates have stopped. You must use the correct procedure to ensure the recovery is successful. The procedures are: • "Recovering the system when the P-VOL is receiving host updates" (page 61). • "Recovering the system when host updates have stopped" (page 61). Recovering the system when the P-VOL is receiving host updates Recovering the secondary storage system from power failure involves the completion of tasks on both the primary storage system and secondary storage system. Because failover does not occur, it is not necessary to complete the steps required to restore the original relationship of the volumes. You use multipath software and either RWC or RAID Manager to complete the recovery procedure. TIP: Some of the steps can be performed using either RWC or RAID Manager. Typically, these steps can be completed more quickly using RAID Manager. 1. Verify that the P-VOL has the latest data and is being updated. Open the Pair Operation window on the primary storage system and check that the VOL Access column shows Access (Lock). 2. On the primary storage system, release the ESAM pair. 3. On the primary storage system, delete the quorum disk ID. 4. Format the quorum disk. 5. On the secondary storage system, register the ESAM primary storage system to the secondary storage system. 6. On the primary and secondary storage systems, add the quorum disk. 7. On the primary storage system, create the ESAM pair. 8. On both the primary and secondary storage systems, make sure that Type shows ESAM. 9. Using multipath software, vary the non-owner paths online. Recovering the system when host updates have stopped Recovering the secondary storage system from power failure when host I/O updates have stopped involves the completion of tasks on both the primary storage system and secondary storage system. You use multipath software and either RWC or RAID Manager to complete the recovery procedure. Recovery from power failure 61

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1.
Verify that the P-VOL has the latest data by opening the
Pair Operation
window on the
secondary storage system (S-VOL side) and checking that the
VOL Access
column is empty
(blank).
2.
On the secondary storage system, release the ESAM pairs.
3.
On the secondary storage system, delete the quorum disk ID.
4.
Format the quorum disk.
5.
On the primary storage system, register the ESAM secondary storage system to the primary
storage system.
6.
On the primary and secondary storage systems, add the quorum disk.
7.
On the primary storage system, create the ESAM pair.
8.
On both the primary and secondary storage systems, make sure that
Type
shows
ESAM
.
9.
Vary the owner and non-owner paths online using the multipath software.
10. Restart host I/O.
Secondary system recovery
There are two procedures you can use to recover the system after a power failure that results in
the initialization of the system memory. The procedure you use depends on whether or not host
I/O updates have stopped. You must use the correct procedure to ensure the recovery is successful.
The procedures are:
•
“Recovering the system when the P-VOL is receiving host updates” (page 61)
.
•
“Recovering the system when host updates have stopped” (page 61)
.
Recovering the system when the P-VOL is receiving host updates
Recovering the secondary storage system from power failure involves the completion of tasks on
both the primary storage system and secondary storage system. Because failover does not occur,
it is not necessary to complete the steps required to restore the original relationship of the volumes.
You use multipath software and either RWC or RAID Manager to complete the recovery procedure.
TIP:
Some of the steps can be performed using either RWC or RAID Manager. Typically, these
steps can be completed more quickly using RAID Manager.
1.
Verify that the P-VOL has the latest data and is being updated. Open the
Pair Operation
window on the primary storage system and check that the
VOL Access
column shows
Access
(Lock)
.
2.
On the primary storage system, release the ESAM pair.
3.
On the primary storage system, delete the quorum disk ID.
4.
Format the quorum disk.
5.
On the secondary storage system, register the ESAM primary storage system to the secondary
storage system.
6.
On the primary and secondary storage systems, add the quorum disk.
7.
On the primary storage system, create the ESAM pair.
8.
On both the primary and secondary storage systems, make sure that
Type
shows
ESAM
.
9.
Using multipath software, vary the non-owner paths online.
Recovering the system when host updates have stopped
Recovering the secondary storage system from power failure when host I/O updates have stopped
involves the completion of tasks on both the primary storage system and secondary storage system.
You use multipath software and either RWC or RAID Manager to complete the recovery procedure.
Recovery from power failure
61