Pair Condition And Recovery: Other Failures - Hitachi G1000 User Manual

Recovery procedure
1 Recover the external system. For details, contact the vendor.
.
2 Recreate or resynchronize the pair.
.
Related topics
• Pair condition before failure on page 6-7

Pair condition and recovery: other failures

The following table shows transitions for pair status and I/O mode, the
volumes that are accessible from the server, and the location of the latest
data when a failure other than explained above occurs.
Before failure
Pair status and I/O
P-VOL
PAIR (Mirror
(RL))
COPY
(Mirror
(RL))
PSUS/PSUE
(Local)
PSUS/PSUE
(Block)
Notes:
1 Depending on the failure factor, if you cannot access the P-VOL, you cannot access
.
neither P-VOL nor S-VOL.
2 Depending on the failure factor, if you cannot access the S-VOL, you cannot access
.
neither P-VOL nor S-VOL.
SIM
• Primary system: SIM varies depending on the failure type
• Secondary system: SIM varies depending on the failure type
Recovery procedure
1 Recover the system.
.
6-46
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
Pair status and I/O
mode
S-VOL P-VOL
PAIR (Mirror PSUE (Local) PSUE
(RL))
PSUE
(Block)
COPY PSUE (Local) PSUE
(Block)
SSUS/PSUE PSUS/PSUE
(Block) (Local)
SSWS PSUS/PSUE
(Local) (Block)
Disaster recovery of global-active device
After failure
Volume
accessible from
mode
the server
1
P-VOL
S-VOL
OK
(Block)
SSWS NG
(Local)
OK
(Block)
1
NG
SSUS/PSUE OK
(Block)
1
NG
SSWS NG
(Local)
NG
Volume
with latest
data
S-VOL
NG P-VOL
OK S-VOL
NG P-VOL
NG P-VOL
NG P-VOL
NG P-VOL
OK S-VOL
S-VOL
2
NG