HP XP Racks User Manual
Page 48
Performing outages when the S-VOL is receiving host I/O
Use this procedure when the S-VOL is receiving host I/O updates. If you also need to power off
and on the primary or secondary storage system connected to the disk, use one of the other
procedures (see
“The procedures for performing planned outages” (page 47)
).
1.
On the secondary storage system, split the pair.
2.
On the secondary storage system, make sure the P-VOL is in PSUS status.
3.
On the primary storage system, run the following command on the quorum disk:
Disconnect External Volumes
4.
On the secondary storage system, run the following command on the quorum disk:
Disconnect External Volumes
5.
Power off the quorum disk.
6.
Power on the quorum disk.
7.
On the secondary storage system, run the following command on the quorum disk:
Reconnect External Volumes
8.
On the primary storage system, run the following command on the quorum disk:
Reconnect External Volumes
9.
On the secondary storage system, complete the following:
1.
Resynchronize the pair.
2.
Make sure the P-VOL status is PAIR.
10. Using multipath software, complete the following:
1.
vary the owner path online.
2.
Vary the non-owner path offline.
11. On the secondary storage system, make sure the P-VOL status is PSUS.
12. On the primary storage system, complete the following:
1.
Make sure the S-VOL status is SSWS.
2.
Reverse the copy direction so that it is again from primary storage system P-VOL to
secondary storage system S-VOL by running the following command on the S-VOL:
pairresync -swaps
3.
Make sure P-VOL and S-VOL status is PAIR.
13. If the non-owner path is offline, vary it online using the multipath software.
Performing planned outages (primary storage system and quorum disk)
1.
Make sure the P-VOL and S-VOL status is PAIR.
2.
Using multipath software, complete the following:
1.
Vary the owner path offline. *1
2.
Make sure that host I/O switches to the non-owner path (a failure occurred)
3.
On the primary storage system, make sure that P-VOL status is PSUS.
4.
On the secondary storage system, complete the following:
1.
Make sure that S-VOL status is SSWS.
2.
Run the following command on the quorum disk:
Disconnect External Volumes
5.
Power off the primary storage system.
6.
Power off the quorum disk. *2
7.
Power on the quorum disk. *2
8.
Power on the primary storage system. *3
48
System maintenance