Replacing a failed external storage system with a new one

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
By replacing a failed external storage system with a new one, you can recover from quorum disk failures without deleting GAD pairs.

CAUTION:
If a GAD pair is not specified for the same quorum disk ID, delete the quorum disk first, and then re-create a quorum disk. When a GAD pair is not specified for the same quorum disk ID, if you replace the external volume for the quorum disk with a new one, the replacement might fail. When you re-create a quorum disk, create GAD pairs if necessary.
  1. Prepare an external volume for a new quorum disk.
    1. Format the disk of a new external storage system.
    2. Map the formatted disk to the primary and secondary storage systems.
      Use the same procedure you use for creating a quorum disk. However, you do not need to set an external volume for the quorum disk.
  2. Check the status of the failed quorum disk.
    1. On the primary storage system, confirm that the status of the quorum disk is BLOCKED. 
      raidcom get quorum -quorum_id 1 -IH0
QRDID : 1
LDEV : 2045
QRP_Serial# : 811111
QRP_ID : M8
Timeout(s) : 30
STS : BLOCKED
    2. On the secondary storage system, confirm that the status of the quorum disk is BLOCKED. 
      raidcom get quorum -quorum_id 1 -IH1
QRDID : 1
LDEV : 2045
QRP_Serial# : 822222
QRP_ID : M8
Timeout(s) : 30
STS : BLOCKED
  3. Check the pair operation mode for the blocked quorum disk.
    Depending on the check results, you might have to split the GAD pair.
    1. If the QM column output with pairdisplay -fcxe command is AA, the GAD pair is split.
      Go to step 4 if this is the case.

      If the QM column is other than AA, the GAD pair is not split in most cases. Go to Step b. 

      # pairdisplay -g oraHA -fcxe -d dev0
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
oraHA   dev0(L)     (CL1-C-0, 0,0)811111   400.P-VOL PAIR 
NEVER,  100   500  -   -   0  1  -      -       - L/M AA
oraHA   dev0(R)     (CL7-C-0,28,0)822222   500.S-VOL PAIR 
NEVER,  100   400  -   -   0  1  -      -       - L/M AA
    2. Split the GAD pair if it is not already split. 
      pairsplit -g oraHA -IH0
  4. Replace the external volume for the quorum disk.
    1. On the primary storage system, replace the current external volume for the quorum disk with a new one. 
      raidcom replace quorum -quorum_id 1 -ldev_id 1234 -IH0
    2. On the primary storage system, confirm that the status of the quorum disk is REPLACING. 
      raidcom get quorum -quorum_id 1 -IH0
QRDID : 1
LDEV : 1234
QRP_Serial# : 811111
QRP_ID : M8
Timeout(s) : 30
STS : REPLACING
    3. On the secondary storage system, replace the current external volume for the quorum disk with a new one. 
       raidcom replace quorum -quorum_id 1 -ldev_id 1234 -IH1
    4. On the secondary storage system, confirm that the status of the quorum disk is REPLACING. 
      raidcom get quorum -quorum_id 1 -IH1
QRDID : 1
LDEV : 1234
QRP_Serial# : 822222
QRP_ID : M8
Timeout(s) : 30
STS : REPLACING
      Note: If the raidcom replace quorum command is executed normally, the status of the quorum disk changes from BLOCKED to REPLACING in five minutes. If the status does not change in five minutes, contact customer support.
  5. Resynchronize the GAD pair you previously split. 
    pairresync -g oraHA -IH0
    If a failure occurs after the one volume capacity of a GAD pair can be expanded, the creation, resync, swap resync, and horctakeover operations of the GAD pair cannot be performed because the capacity of both the volumes is not the same. Make sure to expand the other volume capacity so that the capacity of both the volumes is the same, and then retry the operation.
  6. Confirm that the status of the quorum disk is NORMAL.
    1. On the primary storage system, confirm that the status of the quorum disk is NORMAL. 
      raidcom get quorum -quorum_id 1 -IH0
QRDID : 1
LDEV : 1234
QRP_Serial# : 811111
QRP_ID : M8
Timeout(s) : 30
STS : NORMAL
    2. On the secondary storage system, confirm that the status of the quorum disk is NORMAL. 
      raidcom get quorum -quorum_id 1 -IH1
QRDID : 1
LDEV : 1234
QRP_Serial# : 822222
QRP_ID : M8
Timeout(s) : 30
STS : NORMAL

      If the raidcom replace quorum command is executed normally, the status of the quorum disk changes from REPLACING to NORMAL in a minute.

  7. If the status does not change in five minutes, check whether remote paths between the storage systems are in Normal state.
  8. Confirm that the GAD pair you resynchronized in step 5 is synchronized normally.
    • If the status of the replaced quorum disk is FAILED, the primary storage system and the secondary storage system might be connected to different quorum disks.
      1. Specify the external volume so that the primary storage system and the secondary storage system are connected to the same quorum disk.
      2. After specifying the correct external volume, perform steps 5 through 8.
    • If the status of the quorum disk being replaced is initialized to NORMAL due to a storage system failure, the status of the quorum disk in the other storage system without a failure might not change from REPLACING to NORMAL even after five minutes have elapsed. If the status does not change, correct the failure and resynchronize the GAD pair.

      The status will change to NORMAL.

    • If the status of the quorum disk being replaced remains REPLACING, it might be because the GAD pair is not assigned with the quorum disk ID after replacing the quorum disk.
      1. Delete the quorum disk,
      2. create a quorum disk, and
      3. create the GAD pair.

        If you want to create the GAD pair without deleting the quorum disk, perform step 6 again after you create the GAD pair.

      If the status of your quorum disk does not change from REPLACING even after you perform these procedures, contact customer support.