I really need your help. Not only did my cache ssd drive die completely, after replacing it with a new ssd and rebooting the server I can no longer mount my 2 external USB drives using the unassigned devices plugin. Diagnostics file attached.

 

The drives are XFS formatted and called sdab and sdac. Running xfs_repair -v on both of them shows the same error: bad primary superblock and bad magic number. Running overnight it wasn't able to find a secondary superblock on either drive.

 

The disc log info shows a similar error for both of them:

un 16 17:43:44 unRAIDServer01 unassigned.devices: Adding disk '/dev/sdab1'...
Jun 16 17:43:44 unRAIDServer01 unassigned.devices: Mount drive command: /sbin/mount -t xfs -o rw,noatime,nodiratime '/dev/sdab1' '/mnt/disks/extusb01'
Jun 16 17:43:44 unRAIDServer01 kernel: XFS (sdab1): Filesystem has duplicate UUID 3ebebc09-9352-40a7-83a3-363f4775d5b1 - can't mount
Jun 16 17:43:44 unRAIDServer01 unassigned.devices: Mount of '/dev/sdab1' failed: 'mount: /mnt/disks/extusb01: wrong fs type, bad option, bad superblock on /dev/sdab1, missing codepage or helper program, or other error. '

 

Any idea what I can do to save the data from those 2 drives? Thanks so much for your help.

unraidserver01-diagnostics-20210616-1744.zip

8 minutes ago, AlexNathan345 said:

ilesystem has duplicate UUID

This means that filesystem is already mounted, likely the USB device dropped offline without a clean unmount, rebooting the server should fix it, if it doesn't post the output of:

blkid

after rebooting.

Hi Jorge,

 

Thanks very much for your reply. Rebooting fixed the issue and I was able to mount the 2 USB drives again.

 

Should I still worry about the xfs_repair errors or not?

 

Thanks a lot,

Alex

1 minute ago, AlexNathan345 said:

Should I still worry about the xfs_repair errors or not?

That was normal because of the disks dropping, but you should worry about disks dropping in general, also there area lot of ATA errors on the log.

Doesn't sound too good. What can I do to prevent unassigned disks from dropping? And I know about some ATA errors. They show up after re-booting but don't increase once acknowledged. Or are you referring to something else?

4 minutes ago, AlexNathan345 said:

What can I do to prevent unassigned disks from dropping?

That's usually a USB thing, though some controllers/bridges work better than others.

 

4 minutes ago, AlexNathan345 said:

They show up after re-booting but don't increase once acknowledged.

They look like a connection issue, usually it's a bad SATA cable, replacing them should help.

Thanks a lot. I'll keep an eye on both.

 

One non-unRAID question: any chance of recovering a failed SSD? It started off with a number (200 or so) SATA errors (Reallocated sector count and Uncorrectable error count) but the dive was still accessible. Then I powered down the server to put the SSD into another machine to clone it. Since then no computer even recognises the drive as one. Lost cause or anything I can try? Thanks again.

Since then no computer even recognises the drive as one

That's not uncommon with SSDs, they fail after a power off, and they fail much less than disks but when they fail they usually fail completely, no way that I know of recovering data other than using professional data recovery services.

That's what I feared. Thanks anyway, at least the USB drives are back and running again...