How to repair an AhsayUBS volume after damage

July 7, 2025

Expanding an AhsayUBS volume is not supported as it will cause some of the volume information to be removed which will result in some mount points such as “/tmp” to not mount properly. As a result the AhsayCBS service will no longer startup.

See error that will be encountered below once you try to access AhsayCBS.

Error Message

The following instructions will allow the repair of the damaged volume and resolve the missing volume label and failed mount point issue.

  1. Check the pool ID. 

    ahsayubs:~# zpool status 
  pool: eslsfxDA5CB17E 
 state: ONLINE 
  scan: scrube repaired 0 in 0h0m with 0 errors o Wed Mar  9 
00:00:39 2022 
config: 
 
      NAME               STATE          READ WRITE CKSUM 
      eslsfwxDA5CB17E    ONLINE            0     0     0 
        da0p10           ONLINE            0     0     0 
      logs 
  label/DA5CB17Exd00p07  ONLINE            0     0     0

  2. Check the status. 

    ahsayubs:~# glabel status 
                 Name  Status  Components 
label/DA5CB17Exd00p00     N/A  da0p1 
label/DA5CB17Exd00p01     N/A  da0p2 
label/DA5CB17Exd00p02     N/A  da0p3 
label/DA5CB17Exd00p07     N/A  da0p8 
  ufs/DA5CB17Exesosfw     N/A  mirror/DA5CB17Exesosfw 
ufs/DA5CB17Exesfmfw       N/A  mirror/DACB17Exesfmfw

  3. Unmount the disk pool for label updates. 

    ahsayubs: :~# zpool export eslsfwxDA5CB17E

  4. Create label. 

    ahsayubs:~#glabel create DA5CB17Exd00p09 da0p10
    Refer to your normal AhsayUBS to know the correct naming format. In our example, the naming format is "DA5CB17Exd00p". So DA5CB17Exd00p09 da0p10 was used to create the label.

  5. Check the changes made. 

    ahsayubs:~#glabel status 
                 Name  Status  Components 
label/DA5CB17Exd00p00     N/A  da0p1 
label/DA5CB17Exd00p01     N/A  da0p2 
label/DA5CB17Exd00p02     N/A  da0p3 
label/DA5CB17Exd00p07     N/A  da0p8 
  ufs/DA5CB17Exesosfw     N/A  mirror/DA5CB17Exesosfw 
  ufs/DA5CB17Exesfmfw     N/A  mirror/DA5CB17Exesfmfw 
label/DA5CB17Exd00p09     N/A  da0p10

  6. Remount the disk pool. 

    ahsayubs:~# zpool import eslsfwxDA5CB17E -d /dev/label

  7. Check the changes. 

    ahsayubs:~# zpool status 
  pool: eslsfwxDA5CB17E 
 state: ONLINE 
  scan: scrub repaired 0 in 0h0m with 0 errors on Wed Mar  9 
00:00:39 2022 
config: 
 
        NAME                     STATE     READ WRITE CKSUM 
        eslsfwxDA5CB17E          ONLINE       0     0     0 
          label/DA5CB17Exd00p09  ONLINE       0     0     0 
        logs 
          label/DA5CB17Exd00p07  ONLINE       0     0     0

  8. Manually mount the disk. 

    ahsayubs:~# zfs set mountpoint=/ubs/mnt/eslsfw eslsfwxDA5CB17E

  9. Confirm if the disk is mounted. 

    ahsayubs:~# zfs get mountpoint 
		
NAME			 PROPERTY    VALUE            SOURCE 
eslsfwxDA5CB17E  mountpoint  /ubs/mnt/eslsfw  local

  10. Restart AhsayUBS and manually start AhsayCBS and NFS services.

    • If the AhsayUBS machine has more than one partition, repeat steps 7 to 10 to map the other mounted point(s). Keep repeating this until all the mount point(s) for each partition is mounted.
    • It is advisable to migrate to another disk to have a larger storage instead of expanding the current disk. For instructions on how to migrate for additional storage, please refer to Additional User Storage Migration.
AhsayUBS (DIY)