Hitachi G1000 - Pair Condition and Recovery: Path Failure from the Secondary to Primary System

oraHA dev1(R) (CL1-C-0, 0, 0)322222 4444.S-VOL PAIR
NEVER , 100 2222 - - 0 - - - - L/M
pairdisplay -g oraHA -fxce -IH1
Group PairVol(L/R) (Port#,TID, LU),Seq#,LDEV#.P/S,Status,
Fence, %,P-LDEV# M CTG JID AP EM E-Seq# E-LDEV# R/W
oraHA dev1(L) (CL1-C-0, 0, 0)322222 4444.S-VOL PAIR
NEVER , 100 2222 - - 0 - - - - L/M
oraHA dev1(R) (CL1-A-0, 0, 0)311111 2222.P-VOL PAIR
NEVER , 100 4444 - - 0 - - - - L/M
3. Using the alternate path software, resume I/O to the volume that could
not be accessed from the server (I/O might resume automatically).
Related topics
• I/O modes on page 1-12
• Failure locations on page 6-3
•
SIMs related to GAD on page 6-6
Pair condition and recovery: path failure from the secondary
to primary system
If the statuses of storage systems in both the primary and secondary sites
are normal, a failure might have occurred in a physical path or switch
between the storage systems.
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 you can no longer use any physical path from the secondary
system to the primary system.
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)
COPY
(Mirror (RL))
COPY
(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
Disaster recovery of global-active device
6-27
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide