HP Surestore E Disk Array XP256 HP XP P9000 External Storage Access Manager Us - Page 46

Recovering the disk when the S-VOL was receiving host I/O at deletion

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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 using RAID Manager and changing the Continuous Access Synchronous pair to an 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 create the ESAM pair again: 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 using RAID Manager and changing the Continuous Access Synchronous pair to an ESAM pair: On the primary storage system, split the Continuous Access Synchronous pair using the pairsplit -r command on the P-VOL. Then run the pairresync command to change the Continuous Access Synchronous pair to an ESAM pair. • If using RAID Manager to create the pair again: On the primary storage system, run the paircreate command to create the pair. • If using RWC: On the primary storage system, create the ESAM pair. 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

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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 using RAID Manager and changing the Continuous Access Synchronous pair to an
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 create the ESAM pair again: 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 using RAID Manager and changing the Continuous Access Synchronous pair to an
ESAM pair: On the primary storage system, split the Continuous Access Synchronous
pair using the
pairsplit -r
command on the P-VOL. Then run the
pairresync
command to change the Continuous Access Synchronous pair to an ESAM pair.
•
If using RAID Manager to create the pair again: On the primary storage system, run the
paircreate
command to create the pair.
•
If using RWC: On the primary storage system, create the ESAM pair.
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