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, firmware) for GAD+UR operations, see Requirements and restrictions.
Prerequisites
- 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
- 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