HP XP Racks - Manual (Page 46)

4. On the primary and secondary storage system, add the quorum disk ID.
5. On the primary storage system, create the ESAM pair.
6. On both the primary and secondary storage systems, make sure that Type shows ESAM.
Recovering the disk when the S-VOL was receiving host I/O at deletion
Use this procedure to recovery a disk that was accidentally deleted when the secondary volume
was receiving host I/O at the time of deletion.
1.
Stop the I/O from the host.
2. Release all pairs using the forcibly-deleted quorum disk.
3. Make sure the quorum disk ID is deleted from both primary and secondary storage systems.
4. On the secondary storage system, create a Continuous Access Synchronous pair. The data
flow is from secondary to primary sites.
To do this, specify the ESAM S-VOL as a Continuous Access Synchronous P-VOL.
5. Do one of the following:
•
If changing a Continuous Access Synchronous pair to a ESAM pair: When the copy
operation is completed, run the horctakeover command on the Continuous Access
Synchronous S-VOL. This reverses the Continuous Access Synchronous P-VOL and S-VOL.
•
If using RAID Manager to recreate the ESAM pair: When the copy operation is completed,
run the pairsplit -S command and release the Continuous Access Synchronous pair.
•
If using RWC: When the copy operation is completed, release the Continuous Access
Synchronous pair.
6. Using multipath software, vary the host-to-P-VOL path online.
7. On the primary and secondary storage systems, add the quorum disks.
8. Do one of the following:
•
If changing the Continuous Access Synchronous pair to a ESAM pair: From the primary
system P-VOL using Remote Web Console, split the Continuous Access Synchronous pair,
then change the pair to a ESAM pair. See
“Changing Continuous Access Synchronous
pairs to ESAM pairs ” (page 39) .
•
If creating the pair again:
- If using RAID Manager, run the paircreate command on the primary storage system.
•
If using RWC, create the ESAM pair on the primary storage system.
9. On the primary and secondary storage systems, make sure the volume type is ESAM.
Planned outages for system components
As part of your normal system maintenance activities, you can perform planned outages by turning
the power for system components on and off as needed.
The following are the types of components you can use to turn on and off power:
•
Primary storage systems
•
Secondary storage systems
•
Quorum disks
Options for performing the planned outages
You do not have to use multiple procedures to perform a planned outage on multiple components.
You can use a single procedure to perform all of the steps required to complete a planned outage
for multiple components.
46 System maintenance