Hitachi G1000 - Recovering Paths from the Primary to Secondary System (Pair Status: PAIR)

Before failure After failure
Pair status and I/O
mode
Pair status and I/O
mode
Volume
accessible from
the server
Volume
with latest
data
P-VOL S-VOL P-VOL
S-VOL
1
P-VOL S-VOL
PAIR (Mirror
(RL))
PAIR (Mirror
(RL))
PSUE (Local) PSUE
(Block)
OK NG P-VOL
COPY
(Mirror
(RL))
COPY
(Block)
PSUE (Local) PSUE
(Block)
OK NG P-VOL
PSUS/PSUE
(Local)
SSUS/PSUE
(Block)
PSUS/PSUE
(Local)
SSUS/PSUE
(Block)
OK NG P-VOL
PSUS/PSUE
(Block)
SSWS
(Local)
PSUS/PSUE
(Block)
SSWS
(Local)
NG OK S-VOL
SIM
• Primary system: DD0XYY, 2180XX
• Secondary system: DD3XYY
Recovery procedure
1. Recover the paths from primary to secondary storage systems.
2. Resynchronize the pair.
Related topics
• Pair condition before failure on page 6-7
Recovering paths from the primary to secondary system (pair status:
PAIR)
The following figure shows the failure area and recovery when the pair
suspends due to path failure from the primary system to the secondary
system.
Disaster recovery of global-active device
6-25
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide