When you disconnect a quorum disk, SIM (def0zz) (quorum disk blockade) might be issued (zz: quorum disk ID). If this SIM is issued, delete the SIM after powering on the storage system and reconnecting the quorum disk.Powering off the external storage system, I/O at primary site (GAD+UR)
Use the following procedure to power off the external storage system when server I/O continues to the primary storage system in a GAD 3DC delta resync environment.
Procedure
Using the alternate path software, stop I/O from servers to the GAD secondary storage system.
Direct server I/O to the primary storage system.
On the primary storage system, resynchronize the GAD pair by specifying the P-VOL.
Command example: pairsplit -g oraHA -IH0
Confirm that the pair statuses are changed as shown in the following table.
|
Pair type |
Before the GAD pair suspension |
After the GAD pair suspension |
||
|---|---|---|---|---|
|
P-VOL |
S-VOL |
P-VOL |
S-VOL |
|
|
GAD pair |
PAIR (Mirror(RL)) |
PAIR (Mirror(RL)) |
PSUS (Local) |
PSUS (Block) |
|
UR pair |
PAIR |
PAIR |
PAIR |
PAIR |
|
UR delta resync pair |
PSUS1 |
SSUS1 |
PSUE2 |
SSUS1 |
|
Notes:
|
||||
On the primary and GAD secondary storage systems, disconnect the quorum disks.
Command example: raidcom disconnect external_grp -ldev_id 0x9999 -IH0
When you disconnect a quorum disk, SIM (def0zz) (quorum disk blockade) might be issued (zz: quorum disk ID). If this SIM is issued, delete the SIM after powering on the storage system and reconnecting the quorum disk.
Power off the external storage system.