Powering off external storage system, I/O at secondary site (GAD+UR)

Procedure

1. 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.

2. On the GAD secondary storage system, suspend the GAD pairs by specifying the S-VOL (swap suspension).

   Command example: pairsplit -g oraHA -RS -IH1

3. 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: Device Manager - Storage Navigator displays HOLDING. Device Manager - Storage Navigator displays HOLD.

4. On the primary and GAD secondary storage systems, disconnect the quorum disks.

   Command example: raidcom disconnect external_grp -ldev_id 0x8888 -IH1
   NoteWhen 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.

5. Power off the external storage system.

Parent Topic

• Planned outage of storage systems in a GAD 3DC delta resync environment