Today I found that one of my hard drives lost the operating system, then I formatted the hard drive, and restarted unraid during the formatting process. When I restarted, this hard disk returned to normal, but the content stored on your side changed from hundreds G to 30G. Can I roll back my parity disk to restore this part of the lost content?

 

I once had correct parity results

Edited February 20, 20233 yr by UNRidy

Nope, if you don't have backups you can try a data recovery util, like UFS explorer.

17 minutes ago, JorgeB said:

Nope, if you don't have backups you can try a data recovery util, like UFS explorer.

Really 😭😭😭😭😭

35 minutes ago, UNRidy said:

one of my hard drives lost the operating system

Maybe you mean the disk was disabled? Or perhaps unmountable? Both? The only way an OS would be on a hard drive is if you have a VM on it.

 

NEVER format a disk that has data you wish to keep. Whether the disk was disabled, unmountable, or whatever.

 

In future, please ask for help before doing anything.

15 minutes ago, trurl said:

Maybe you mean the disk was disabled? Or perhaps unmountable? Both? The only way an OS would be on a hard drive is if you have a VM on it.

 

NEVER format a disk that has data you wish to keep. Whether the disk was disabled, unmountable, or whatever.

 

In future, please ask for help before doing anything.

Now I‘m using UFS to recover files as much as I can. I can't revert parity disk as latest parity result? what is the logic of update parity result ? 

Parity with Unraid is always real-time.

50 minutes ago, JorgeB said:

Parity with Unraid is always real-time.

Format is a write operation. It writes an empty filesystem to the disk. When you format a disk in the parity array, Unraid treats that write operation just as it does any other, by updating parity. So, after formatting a disk in the parity array the only thing it can rebuild is an empty filesystem.