A source
UR P-VOL failure that occurs when data is being migrated "during migration"
The table below shows the changes in the pair status before and after a failure.
| Pair type
|
Pair status before failure
|
Pair status after failure
|
| P-VOL
|
S-VOL
|
P-VOL
|
S-VOL
|
|
GAD pair
|
COPY (Local)
|
COPY (Block)
|
PSUE (Local)
|
PSUE (Block)
|
| Source
UR pair
|
PAIR
|
PAIR
|
PSUE
|
PSUE
|
When recovering from this failure, you must perform the pair operations so that the S-VOL at the source
UR secondary site can accept I/Os from the servers to continue the I/Os. Restore the configuration using the S-VOL data after the target pair is restored.
The following recovery procedures assume that one volume failure occurs in the journal that configures multiple pairs.
-
Stop I/Os from the servers to the journal to which the failed pair belongs on the source
UR primary storage system.
-
Specify the S-VOL from the source
UR secondary site, and then suspend (swap suspend) the
UR pair.
pairsplit -g oraUR00 -RS -IH2
-
Resume I/Os from the servers to the storage system at the source
UR secondary site.
-
Delete the
UR pair on which the P-VOL failure occurred at the source
UR primary site.
pairsplit -g oraUR00 -d dev00 -S -IH1
-
Delete the
GAD pair on which the P-VOL failure occurred at the source
UR primary site by specifying the P-VOL.
pairsplit -g oraHA00 -d dev00 -S -IH1
-
Remove the P-VOL failure at the source
UR primary site, and then recover the P-VOL (Format the P-VOL if the formatting is required for recovery).
-
Specify the P-VOL, and then suspend the
GAD pair sharing the same volumes with a
UR pair that uses the journal to which the failed
UR pair belongs.
pairsplit -g oraHA00 -IH1
-
Specify the S-VOL from the source
UR secondary site, and then resynchronize (swap resync) the
UR pair.
pairresync -g oraUR00 -swaps -IH2
The volume of the source
UR pair at the primary site has changed to the S-VOL and the volume at the secondary site has changed to P-VOL.
-
From the source
UR secondary site, create a
UR pair that uses the volume recovered from the failure.
paircreate -g oraUR00 -d dev00 -f async -vl -jp 0 -js 0 -IH2
-
Confirm that the source
UR pair status has changed to PAIR.
-
Stop I/Os from the servers to the storage system at the source
UR secondary site.
-
Specify the S-VOL from the source
UR primary site, and then suspend (swap suspend) the
UR pair.
pairsplit -g oraUR00 -RS -IH1
-
Resume I/Os from the servers to the storage system at the source
UR primary site.
-
Specify the S-VOL from the source
UR primary site, and then resynchronize (swap resync) the
UR pair.
pairresync -g oraUR00 -swaps -IH1
The volume of the source
UR pair at the primary site has changed to the P-VOL and the volume at the secondary site has changed to S-VOL.
-
Confirm that the source
UR pair status has changed to PAIR.
-
Resynchronize the
GAD pair from the source
UR primary site.
pairresync -g oraHA00 -IH1
-
Create a
GAD pair that uses the volume recovered from the failure.
paircreate -g oraHA00 -d dev10 -f never -vl -jp 0 -IH1