HP XP P9500 Storage - Manual (Page 50)

Recovering failed S-VOL in the secondary system
If a failure occurs in the secondary system S-VOL, the primary system continues to accept host I/O.
Recover the secondary system S-VOL as follows.
Procedure 32 To recover the secondary system S-VOL:
1. Using multipath software, make sure that the primary system is receiving host I/O.
2. Using multipath software, vary the non-owner path offline.
3. On the primary system, perform the Pairsplit-S operation to release the pair.
4. Clear the failure in the secondary system S-VOL. If you use an external volume as the S-VOL,
clear the failure in the external volume. Contact HP Technical Support for assistance.
5. On the primary system, create the pair (Paircreate(ESAM)).
6. On both the primary and secondary systems, make sure that the pair volume's Type field
displays ESAM.
7. Using multipath software, vary the non-owner path online.
8. Restart host I/O.
Recovery using resynchronization
It is possible to recover from failure by resynchronizing the pair. ESAM pairs do not need to be
released and recreated when all the following conditions are satisfied.
•
ESAM volumes are not blocked
•
For a quorum disk failure, the quorum disk does not need to be replaced or reformatted.
•
Data is not lost from shared memory in a power outage.
The recovery procedures depend on whether hosts operations continue or stop, and whether a
failover to the S-VOL occurs or not.
Use the recovery workflow in the following diagram that fits you system's condition.
50 Disaster recovery operations