Recovering failed p-vol in the primary system – HP XP P9500 Storage User Manual
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which consists of several tasks. This section describes the recovery procedures for the following
P-VOL and S-VOL failure scenarios:
•
Case 1: P-VOL failure in the primary system.
•
Case 2: S-VOL failure in the primary system.
•
Case 3: P-VOL failure in the secondary system.
•
Case 4: S-VOL failure in the secondary system.
Recovering failed P-VOL in the primary system
If a failure occurs in the primary system P-VOL when it is receiving I/O, a failover in the secondary
system is triggered. This causes the secondary system to accept I/O.
In the following procedure, you have the option of performing Remote Web Console or RAID
Manager tasks for some operations. The RAID Manager operations complete faster.
Procedure 29 To recover the primary system P-VOL:
1.
Using multipath software, make sure that the secondary system is receiving host I/O.
2.
Stop I/O from the host.
3.
On the primary system, perform the Pairsplit-S operation on the P-VOL to release the ESAM
pair.
4.
Clear the failure in the primary system P-VOL. If you use an external volume as the P-VOL,
clear the failure in the external volume. Contact HP Technical Support for assistance.
5.
On the secondary system, create a Continuous Access Synchronous pair from the original
S-VOL to the P-VOL. Data flow is from secondary to primary systems.
6.
If using RAID Manager, continue with this step. If using Remote Web Console, skip to the next
step.
1.
On the primary system, execute the RAID Manager horctakeover command on the
new Continuous Access Synchronous S-VOL. This reverses the P-VOL/S-VOL relationship:
the S-VOL on the primary system now becomes the P-VOL.
2.
On the primary system, split the Continuous Access Synchronous pair using the Pairsplit-r
command.
3.
On the primary system, use Remote Web Console to perform the Pairresync operation
to change the Continuous Access Synchronous pair to an ESAM pair.
7.
If using Remote Web Console, continue as follows:
1.
On the secondary system, release the Continuous Access Synchronous pair.
2.
On the primary system, create the ESAM pair.
8.
On both primary and secondary systems, make sure that the pair volume's Type field displays
ESAM.
9.
Using multipath software, vary the owner path online.
10. Restart I/O.
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Disaster recovery operations