Recovering the secondary system – HP XP P9500 Storage User Manual
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Procedure 36 To recover the primary system when host updates are stopped:
1.
Verify that the P-VOL has the latest data by opening the Pair Operation window on the
secondary system (S-VOL side) and checking that the VOL Access column displays nothing
(blank).
2.
On the secondary system, release the ESAM pair(s).
3.
On the secondary system, delete the quorum disk ID.
4.
Format the quorum disk.
5.
On the primary system, register the ESAM secondary storage system to the primary system.
See
“Configuring primary and secondary systems ” (page 23)
6.
On the primary and secondary systems, add the quorum disk. See
7.
On the primary system, create the ESAM pair.
8.
On both the primary and secondary systems, make sure that the pair volume's Type field is
ESAM.
9.
Vary the owner and non-owner paths online using the multipath software.
10. Restart host I/O.
Recovering the secondary system
When the secondary system's memory has been initialized, recover the ESAM system based on
one of the following:
•
Whether P-VOL is receiving host updates following failover.
•
Whether host updates are stopped completely.
This procedure can be used for recovery of one or more pairs.
Procedure 37 To recover the secondary system when the P-VOL is receiving host updates:
1.
Verify that the P-VOL has the latest data and is being updated. Open the Pair Operation
window on the primary system and check that the VOL Access column displays Access (Lock).
2.
On the primary system, release the ESAM pair.
3.
On the primary system, delete the quorum disk ID.
4.
Format the quorum disk.
5.
On the secondary system, register the ESAM primary storage system to the secondary system.
See
“Configuring primary and secondary systems ” (page 23)
6.
On the primary and secondary systems, add the quorum disk. See
7.
On the primary system, create the ESAM pair.
8.
On both the primary and secondary systems, make sure that the pair volume's Type field is
ESAM.
9.
Using multipath software, vary the non-owner paths online.
Procedure 38 To recover the secondary system when host updates are stopped:
1.
Verify that the S-VOL has the latest data by opening the Pair Operation window on the primary
system (P-VOL side) and checking that the VOL Access column displays nothing (blank).
2.
On the primary system, release the ESAM pair(s).
3.
On the primary system, delete the quorum disk ID.
4.
On the secondary system, register the ESAM primary storage system to the secondary system.
See
“Configuring primary and secondary systems ” (page 23)
5.
On the secondary system, create a Continuous Access Synchronous pair. The data flow is
from secondary to primary sites.
6.
Format the quorum disk.
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Disaster recovery operations