I unmounted an external drive, and when trying to re-mount I get a "bad superblock" error from the unassigned devices plugin:

Mount of '/dev/sdj1' failed: 'mount: /mnt/disks/TOSHIBA_HDWG11A_6160A04UFATG: wrong fs type, bad option, bad superblock on /dev/sdj1, missing codepage or helper program, or other error. '

 

And also this: 

Oct 30 12:20:05 Mercury kernel: XFS (sdj1): Filesystem has duplicate UUID baf836bb-2c2a-4c07-9b57-3c25e5706a96 - can't mount

 

How can I mount the drive without loosing the contents of the drive? I'm happy to provide any more information if needed. Any help is very much appreciated! 

 

Disk information: 

Disk /dev/sdj: 9.1 TiB, 10000831348736 bytes, 19532873728 sectors
Disk model: ASM1156-PM      
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: F6FD07F5-FB6A-433B-8892-89A656D64606

Device     Start         End     Sectors  Size Type
/dev/sdj1     64 19532873694 19532873631  9.1T Linux filesystem

 

I also tried to change the UUID in the unassigned devices plugin but got this error: 

Oct 30 12:51:54 Mercury unassigned.devices: Changing partition '/dev/sdj1' UUID. 
Result: ERROR: The filesystem has valuable metadata changes in a log which needs to be replayed. Mount the filesystem to replay the log, and unmount it before re-running xfs_admin. If you are unable to mount the filesystem, then use the xfs_repair -L option to destroy the log and attempt a repair. 
Note that destroying the log may cause corruption -- please attempt a mount of the filesystem before doing this.

 

Edited October 30, 20214 yr by cagemaster
updated with disk information

Solved: 

 

I ran:

 

 xfs_repair -v -L /drv/sdj1

 

and after that had finished I changed the UUID from the unassigned devices plugin. I was then able to mount the drive after this! 

 

Note that this may cause corruption but for me it worked fine!!