Hey all,

Thank you to anyone who can help out.

I came across a drive that stated:

"unraid unmountable: unsupported or no file system"

I tried stopped/started and nothing and I then formatted.

I rebuilt parity and all seems like it is back to normal but I see that the drive is empty.

Where did that data go? Was it moved to other hard drives or is it gone?

Thanks for the help!

Edited November 11, 2025Nov 11 by DoubleJJ

43 minutes ago, DoubleJJ said:

or is it gone?

It is gone I am afraid. You should not have formatted the drive. You would have got a warning when you tried that you will lose the contents of that drive. The correct process for handling a drive that suddenly become unmountable is covered here in the online documentation.

2 hours ago, DoubleJJ said:

Where did that data go?

You formatted so it is gone. Why didn't you ask for help before doing anything?

Do you have another copy of anything important and irreplaceable? Parity is not a substitute for backups. Plenty of ways to lose data besides a disk failure, including user error.

For future reference

check filesystem

Thank you for the help and guidance.

I was in a rush multi tasking and wasn't paying much attention and was just clicking through.

I plugged in the HD to my windows machine and I am going to try and partition recover first.

The super scan is looking for XFS which will take some time.

I did a quick file recovery check and there is data there, but it will be easier if I can recover the partition.

If I just do data then it will come back without any filenames.

I am using Active partition Recovery and Easeus.
Fingers crossed.

Edited November 12, 2025Nov 12 by DoubleJJ

I actually might have an older HD of the same disk that was marked as bad by unraid because of a bad power supply.
I will check the drives on windows with Linux reader and see if I can find any data.

It looks like I dodged a bullet.
One of my unraid drives that I removed a month ago has all the data and I was able to read it all with Linux Reader.

For the hell of it I am going to attempt to recover the old partition and map out the process if it is possible.

Thank you all for the responses!