Recovering From A Path Failure Between The Server And Primary System - Hitachi G1000 User Manual

data when you can no longer use a physical path between the server and a
storage system.
Before failure
Pair status and I/O
P-VOL
PAIR (Mirror
(RL))
COPY
(Mirror
(RL))
PSUS/PSUE
(Local)
PSUS/PSUE
(Block)
*If failures occur in all servers that access to the P-VOL or S-VOL, then you cannot
access either volumes.
SIM
• Primary system: None
• Secondary system: None
Recovery procedure
1 Recover the path between the server and the storage system.
.
2 Recover the path from the server to the pair volume.
.
Related topics
• Pair condition before failure on page 6-7
Recovering from a path failure between the server and primary
system
The following figure shows the failure area and recovery when the path
between the server and primary storage system fails.
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
Pair status and I/O
mode
S-VOL P-VOL
PAIR (Mirror PAIR (Mirror
(RL)) (RL))
COPY COPY
(Block) (Mirror (RL))
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
S-VOL* P-VOL
PAIR (Mirror OK
(RL))
COPY OK
(Block)
SSUS/PSUE OK
(Block)
SSWS NG
(Local)
Volume
with latest
data
S-VOL
OK Both P-VOL
and S-VOL
NG P-VOL
NG P-VOL
OK S-VOL
6-9