June 9, 20233 yr I think I just deleted all my data. My original plan was to change the filesystem of one of my data drives. So I stopped the array, changed the FS, started the array. Now it said unmountable. Now for some reason, god nows why, I clicked format the drive. I know there's a lot of warnings that it does not belong to a parity rebuild and you should not do this, but for whatever reason I thought: Yea it is fine in this case, it will rebuild from parity when I format the drive, because how else should I tell unraid to do it. Well, that was obviously wrong. After that I thought "Well, this is not working, let's find a guide." So I used all of the steps of this guide afterwards: https://flemmingss.com/replacing-a-data-drive-in-unraid/ . After 5 minutes into the parity rebuild I realized that I messed up. I stopped the array and exported diagnostics. Maybe someone could have a look at the diagnostics and tell me what my next step would be? Maybe I didn't mess up, but I doubt that. nass-diagnostics-20230609-1214.zip
June 9, 20233 yr Community Expert Formatting a drive deletes all data there and updates parity accordingly, only option to try an recover the data is to use a deleted file recovery util, like UFS explorer.
June 9, 20233 yr Author Just now, JorgeB said: Formatting a drive deletes all data there and updates parity accordingly, only option to try an recover the data is to use a deleted file recovery util, like UFS explorer. Doesn't updating parity for 2 TB of files take a long time? Couldn't parity still be valid? Edited June 9, 20233 yr by FayeInMay Just a quote
June 9, 20233 yr Community Expert Solution Parity update is real time, once the format is done, parity is updated.
June 9, 20233 yr Author Okay, UFS explorer does recognize all my folders I had at least. Maybe only 30 GB (parity rebuild progress) is gone of 1.5 TB. That would be really good. I wonder: Does ZFS write to the drive in a specific order? Meaning, do I need to only search block 0 to 2tb or search all blocks? Maybe that's a stupid question, but I have no clue how exactly that works.
June 9, 20233 yr Community Expert 26 minutes ago, FayeInMay said: I wonder: Does ZFS write to the drive in a specific order? AFAIK it can write anywhere, even when using an empty disk.
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