F.2.3 Restoration Procedures

Restoration procedures vary depending on NAS volume malfunction, NAS backup volume malfunction, and malfunction of the device in the operation side. In addition, the volume malfunction varies depending on file system failure and RAID malfunction.

The recovery procedures for each malfunction are explained below:

Recover from Malfunction of NAS Volume

At the time of file system failure
Refer to "3.10.1.3 How to Execute Restoration".
At the time of RAID malfunction
Refer to "3.10.6 Recovery Procedure When NAS Volume or NAS Backup Volume Fails".

Recover from Malfunction of NAS Backup Volume

The procedure to recover from malfunction of NAS backup volume is as follows. After performing this procedure, restore data to a NAS volume as required:

At the time of file system failure
1. Stop QuickOPC from NAS volume to NAS backup volume in the operation side (stop of physical copy and Tracking processing).
2. Stop REC and perform REC reversal (from device in the stand-by/backup side to device in the operation side).
3. Start QuickOPC in the reverse direction from the backup volume of the device in the stand-by/backup side to the volume for REC.
  Point
  After the QuickOPC copy, a wait for completion of the physical copy needs to be queued. Confirm completion of the physical copy by checking that the copy phase turns to Tracking status after executing acopc query command.
4. Resume REC from the volume for REC in the stand-by/backup side to NAS backup volume of the operation device.
5. Suspend REC after REC becomes equivalent state.
6. Perform REC reversal (from device in the operation side to device in the stand-by/backup side), and resume REC.
  Point
  After performing copy to a NAS backup volume in the operation side using REC, it is required to check whether REC source and destination volumes are in an equivalency maintenance state. For the detail, refer to "3.2.2.4 Restore on REC Backup Environment".
At the time of RAID malfunction
1. Stop QuickOPC from NAS volume in the stand-by/backup side to NAS backup volume (stop of physical copy and Tracking processing).
2. Stop REC.
3. Recreate NAS backup volume of the device in the operation side. For the recreation procedures, refer to Procedures 1 or 2 of "3.10.6 Recovery Procedure When NAS Volume or NAS Backup Volume Fails".
4. Start QuickOPC in the reverse direction from the backup volume of the device in the stand-by/backup side to the volume for REC.
  Point
  After the copy by QuickOPC, a wait for completion of the physical copy needs to be queued. Confirm completion of the physical copy by checking that the copy phase turns to Tracking status after executing acopc query command.
5. Perform REC in the reverse direction from the volume for REC in the stand-by/backup side to NAS backup volume of the operation device.
6. Suspend REC after REC becomes equivalent state.
7. Restore NAS volume. For restoration of NAS volume, refer to "3.10.1.3 How to Execute Restoration".
8. Perform REC reversal (from device in the operation side to device in the stand-by/backup side), and resume REC.
  Point
  After performing copy to a NAS backup volume in the operation side using REC, it is required to check whether REC source and destination volumes are in an equivalency maintenance state. For the detail, refer to "3.2.2.4 Restore on REC Backup Environment".

Malfunction of Device in Operation Side

Continuance of services using the device in the stand-by side
1. Stop QuickOPC from the volume for REC to NAS backup volume in the stand-by side (stop of physical copy and Tracking processing).
2. Restore NAS volume or mount NAS backup volume on the device in the stand-by side. Refer to "3.10.1.3 How to Execute Restoration" for restoration of NAS volume, and "3.10.3.1 Mounting / Unmounting Procedures" for mounting of NAS backup volume.
Continuance of services by replacing the device in the operation side
1. Stop REC.
2. Replace the device.
3. Recreate NAS volume and NAS backup volume on the replaced device. The logical volume number of the NAS volume to be created is required to be same as that before the occurrence of the malfunction. For the recreation procedures, refer to Procedures 1 and 2 of "3.10.6 Recovery Procedure When NAS Volume or NAS Backup Volume Fails".
4. Backup NAS volume of the replaced device using Web Console or acnas backup command. Refer to "3.10.1.2 How to Execute Backup" for backup using Web Console and "3.10.2.2 How to Execute Backup Commands" for backup using acnas backup command.
5. Stop QuickOPC from NAS volume to NAS backup volume (stop of physical copy and Tracking processing).
6. Create a copy group of REC to perform REC from the backup volume in the stand-by/backup side to NAS backup volume of the replaced device, and perform REC. After confirming the equivalent state, stop REC.
  Point
  After performing copy to a NAS backup volume in the operation side using REC, it is required to check whether REC source and destination volumes are in an equivalency maintenance state. For the detail, refer to "3.2.2.4 Restore on REC Backup Environment".
7. Restore NAS volume or mount NAS backup volume in the operation side. Refer to "3.10.1.3 How to Execute Restoration" for restoration of NAS volume, and "3.10.3.1 Mounting / Unmounting Procedures" for mounting of NAS backup volume.
Note
In the case of restoration in the device in the stand-by side or the device after replacement due to malfunction of the device in the operation side, access to shared folders need to be enabled again.
For how to access shared folders, refer to "Operation Method" in "NAS Management" in the ETERNUS SF Storage Cruiser Operation Guide or ETERNUS SF Express Operation Guide.