Recovering from a failure that occurred during phase 1 in the remote path from the secondary to the primary storage system of the source GAD pair

Global Active Device for VSP One Block

Version

10.5.x

File Size

25537 KB

Audience

anonymous

Part Number

MK-23VSP1B011-11

ft:lastEdition

2026-06-23

Recover from the failure in the remote path.

Verify the pair status of the source GAD pair.

Command example:

pairdisplay –g oraHA00 –fcxe –IH0
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
QM DM P PR
oraHA00 dev00(L) (CL1-C-0, 0, 0)411111 1111.P-VOL PSUE
NEVER , 100 2222 - - 0 1 - - - B/B - D
N D
oraHA00 dev00(R) (CL1-C-0, 0, 0)422222 2222.S-VOL SSWS
NEVER , 55 1111 - - 0 1 - - - L/L - D
N D

Perform either of the following recovery procedures depending on the pair status (I/O mode).
- If the pair status (I/O mode) of the P-VOL of the source GAD pair is PSUE(Local): Continue data migration using the procedure described in Creating a target GAD pair.
- If the pair status (I/O mode) of the S-VOL of the source GAD pair is SSWS(Local):
  1. Resynchronize the source GAD pair by specifying the S-VOL.
    Command example:
```
pairresync –g oraHA00 -swaps –IH1
```
  2. Wait until the copy operation for the source GAD pair is complete, and then verify that the pair status has changed to PAIR.
    Command example:
```
pairdisplay –g oraHA00 –fcxe –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 QM DM P PR
oraHA00 dev00(R) (CL1-C-0, 0, 0)422222 2222.P-VOL PAIR
NEVER , 100 1111 - - 0 1 - - - L/M -
D N D
oraHA00 dev00(L) (CL1-C-0, 0, 0)411111 1111.S-VOL PAIR
NEVER , 100 2222 - - 0 1 - - - L/M -
D N D
```
    If you want to continue data migration, continue the operations using the procedure described in Suspending the source GAD pair by specifying the P-VOL. However, in the configuration of this disaster recovery, the S-VOL of the source GAD pair shares the LDEV with the P-VOL of the temporary GAD pair. Therefore, take the host path to the P-VOL of the source GAD pair offline, and then suspend the source GAD pair by specifying the S-VOL during the procedure described in Suspending the source GAD pair by specifying the P-VOL.
    
    If you can restart data migration from the beginning, go to the next step.
  3. Suspend the temporary GAD pair by specifying the P-VOL.
    Command example:
```
pairsplit -g oraHA01 -IH0
```
  4. Verify that the temporary GAD pair has been suspended.
    Command example:
```
pairdisplay -g oraHA01 -fcxe -IH0
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
QM DM P PR
oraHA01 dev01(L) (CL1-C-0, 0, 0)411111 1111.P-VOL PSUS
NEVER , 55 1111 - - 1 1 - - - L/L - D
N D
oraHA01 dev01(R) (CL1-C-0, 0, 0)833333 1111.S-VOL SSUS
NEVER , 100 1111 - - 1 1 - - - B/B - D
N D
```
  5. Delete the suspended temporary GAD pair.
    Command example:
```
pairsplit -g oraHA01 -S -IH0
```
  6. Verify that the temporary GAD pair has been deleted.
    Command example:
```
pairdisplay -g oraHA01 -fcxe -IH2
oraHA01 dev01(R) (CL1-C-0, 0, 0)833333 1111.SMPL ----
------,----- ----- - - - - - - - -/- - -
- -
oraHA01 dev01(L) (CL1-C-0, 0, 0)411111 1111.SMPL ----
------,----- ----- - - - - - - - -/- - -
- -
```
  7. Reverse the P-VOL and the S-VOL of the source GAD pair.
    Command example:
```
pairresync –g oraHA00 –swaps –IH0
```
  8. Verify that the P-VOL and the S-VOL of the source GAD pair have been reversed.
    Command example:
```
pairdisplay –g oraHA00 –fcxe –IH0
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 QM DM P PR
oraHA00 dev00(L) (CL1-C-0, 0, 0)411111 1111.P-VOL PAIR
NEVER , 100 2222 - - 0 1 - - - L/M -
D N D
oraHA00 dev00(R) (CL1-C-0, 0, 0)422222 2222.S-VOL PAIR
NEVER , 100 1111 - - 0 1 - - - L/M -
D N D
```
  9. Continue data migration using the procedure described in Creating a target GAD pair.