Hitachi G1000 - Pair condition and recovery: P-VOL failure (LDEV blockade)

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
(Block)
SSWS
(Local)
NG OK S-VOL
COPY
(Mirror
(RL))
COPY
(Block)
PSUE (Local) PSUE
(Block)
NG NG
None
1
PSUS/PSUE
(Local)
SSUS/PSUE
(Block)
PSUS/PSUE
(Local)
SSUS/PSUE
(Block)
NG NG
None
2
PSUS/PSUE
(Block)
SSWS
(Local)
PSUS/PSUE
(Block)
SSWS
(Local)
NG OK S-VOL
Notes:
1. Recover the data from ShadowImage, Thin Image, or other backup data.
2. Recover the data using the S-VOL data that is not the latest, ShadowImage, Thin
Image, or other backup data.
SIM
• Primary system: 3A0XYY, DD1XYY, DFAXXX, DFBXXX, EF9XXX
• Secondary system: DD1XYY
Recovery procedure
1. Recover the P-VOL.
2. Recreate the pair.
Related topics
•
Pair condition before failure on page 6-7
Recovering the P-VOL (pair status: PAIR)
The following figure shows the failure area and recovery when the pair
suspends due to a P-VOL failure.
6-12
Disaster recovery of global-active device
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide