When you specify an S-VOL and suspend (swap suspend) a GAD pair, the GAD S-VOL pair status changes from PAIR to SSWS. After the pair status changes to SSWS, the UR delta resync pair changes to a UR pair, and the copying from the GAD S-VOL to the UR S-VOL starts. This change in the copy source of the UR pair is the delta resync operation.

For details about storage system support (models, microcode) for GAD+UR operations, see the Global-Active Device User Guide.

Before you begin

• Pair status and mirror status must be as follows:

  Pair type	Pair status		Mirror status
  	P-VOL	S-VOL	Master journal	Restore journal
  GAD pair	PAIR	PAIR	Not applicable	Not applicable
  UR pair	PAIR	PAIR	PJNN	SJNN
  UR delta resync pair	PSUS*	SSUS*	PJNS	SJNS
  * If you use Device Manager - Storage Navigator to suspend (swap suspend) the pair, make sure the status of the UR delta resync pair is HOLD.

• All the differential data of the UR pairs is stored in the primary site's journal.
• Data must be able to be transferred between the UR P-VOL and S-VOL.
• The number of S-VOLs in the UR pairs is the same as that in the UR delta resync pairs.
• There is no failure in the remote path between the secondary site of GAD and the secondary site of UR.
• After creating the UR pair, you must keep updating I/O from the server to the GAD pair's P-VOL or S-VOL for about two minutes.

Command example

pairsplit -g oraHA -RS -IH1