Pair Condition And Recovery: Path Failure From The Primary To External System - Hitachi G1000 User Manual

P-VOL
PSUS/
PSUE
PSUS/
PSUE
PSUS/
PSUE
PSUS/
PSUE
7 If the alternate path to the S-VOL has been deleted, add the alternate
.
path.
a
.
b
.
Related topics
• Pair condition before failure on page 6-7
Pair condition and recovery: path failure from the primary to
external system
If the status of external system is normal, a failure might have occurred in a
physical path from primary or secondary system to the external system, or a
switch. Recover from the failure that occurred in the physical path or switch.
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 primary system
to the quorum disk's external system.
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
Pair status
S-VOL P-VOL
PSUS/ Local
PSUE
SMPL Local
SSWS Block
SMPL Block
If you have detached the channel port connection paths of the
secondary site, restore all channel port connection paths to their
original status, and then add the alternate path.
Using the alternate path software, add the alternate path deleted at
step 1 to the S-VOL.
Disaster recovery of global-active device
I/O mode
S-VOL
Block Resynchronize the pair specifying the P-
VOL.
Not 1 Delete the pair specifying the P-VOL.
.
applicabl
2 When the virtual LDEV ID is set to
.
e
the S-VOL, delete the virtual LDEV
ID, and then set the reservation
attribute to the S-VOL.
3 Recreate the pair specifying the P-
.
VOL.
Local Resynchronize the pair specifying the S-
VOL.
Not 1 Delete the pair forcibly from the
.
applicabl primary system, specifying Disable
e in the Volume Access field (Delete
Pairs window).
2 Release the reservation attribute
.
from the S-VOL, and then set the
same virtual LDEV ID as was used
before the pair was deleted.
3 Recreate the pair specifying the S-
.
VOL.
Procedure
6-33