Unmountable: Wrong or no file system

[koenjdejong]

Hi there!

 

I've had a power outage a couple of nights ago. Now, one of my disks shows up as 'Unmountable: Wrong or no file system'

I do not have the knowledge to make an informed decision to lose the least amount of data possible.

I've read other posts, but often people make wrong decisions. Can anyone help me make the correct one? *Zip removed for privacy garuantees*

 

Much appreciated!

 

Koen

 

Edited December 16, 2022 by koenjdejong
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[itimpi]

The basic process for handling unmountable drives is covered here in the online documentation accessible via the ‘Manual’ link at the bottom of the GUI or the DOCS link at the top of each forum page.

[JorgeB]

Nov 28 11:53:25 nugget kernel: BTRFS error (device md1): parent transid verify failed on 4376705761280 wanted 36734 found 36690

 

This error is fatal, it means some writes were lost, it can happen if a storage device lies about flushing it's write cache, this is usually a drive (or controller) firmware problem.

 

Btrfs restore (option #2 here) is the best bet to try and recover some data for this, then the device will need to be formatted and the data restore.

[koenjdejong]

Thanks a lot for your quick responses and help!