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 external storage system, I/O at secondary site (GAD+UR)
Use the following procedure to power off the external storage system when server I/O continues to the GAD storage system in a GAD 3DC delta resync environment.
Procedure
Using the alternate path software, stop I/O from servers to the primary storage system. Direct server I/O to the GAD secondary storage system.
On the GAD secondary storage system, suspend the GAD pairs by specifying the S-VOL (swap suspension).
Command example: pairsplit -g oraHA -RS -IH1
Confirm that the pair types and the pair statuses are changed as shown in the following table.
|
Before the GAD pair suspension |
After the GAD pair suspension |
||||
|---|---|---|---|---|---|
|
Pair type |
Pair status |
Pair type |
Pair status |
||
|
P-VOL |
S-VOL |
P-VOL |
S-VOL |
||
|
GAD pair |
PAIR (Mirror(RL)) |
PAIR (Mirror(RL)) |
GAD pair |
PSUS (Block) |
SSWS (Local) |
|
UR pair |
PAIR |
PAIR |
UR delta resync pair |
PSUE1 |
SSUS2 |
|
UR delta resync pair |
PSUS2 |
SSUS2 |
UR pair |
PAIR |
PAIR |
|
Notes:
|
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On the primary and GAD secondary storage systems, disconnect the quorum disks.
Command example: raidcom disconnect external_grp -ldev_id 0x8888 -IH1
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.