HP XP Racks - Manual (Page 61)

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.
TIP: Some of the steps can be performed using either RWC or RAID Manager. Typically, you
can complete these steps quicker using RAID Manager.
1. Verify that the S-VOL has the latest data by opening the Pair Operation window on the primary
storage system (P-VOL side) and checking that the VOL Access column is empty (blank).
2. On the primary storage system, release the ESAM pairs.
Recovery from power failure 61