Hitachi G1000 - Pair Condition and Recovery: External System Failure

Interface Condition CVS attribute
Other than above Allowed
* Ask the maintenance personnel to operate the Web Console.
Related topics
• I/O modes on page 1-12
• Creating the quorum disk on page 4-17
• Failure locations on page 6-3
•
SIMs related to GAD on page 6-6
• Configuring the quorum disk on page 5-6
•
Discontinuing a global-active device environment on page 5-23
Pair condition and recovery: external system failure
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 the external 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 (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: 21D0XY, 21D2XX, DD2XYY, DEF0ZZ, EF5XYY, EFD000,
FF5XYY
• Secondary system: 21D0XY, 21D2XX, DD2XYY, DEF0ZZ, EF5XYY,
EFD000, FF5XYY
Disaster recovery of global-active device
6-45
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide