October 19, 20232 yr Hello, The server has been off for a few months. I fired it up with no issues until a few hours later where where drive 1 became "unmountable: Wrong or no file system" I then tried to run parity sync thinking that may have helped then Disk 4 became "unmountable: Wrong or no file system". My question is... I have spare drives, can I just swap them? When I say "swap" I mean: shut down array, change disk 1 and 4 to another "Unassigned device", start the array formatting the new drives and rebuilding? - Thanks,
October 20, 20232 yr Rebuilding a drive will just rebuild the same unmountable state. Formatting the drive will write a blank table of contents to the drive updating parity as well, meaning the rebuilt drive will be empty. You need to repair the filesystem, https://docs.unraid.net/legacy/FAQ/check-disk-filesystems/#checking-and-fixing-drives-in-the-webgui
October 20, 20232 yr Author Solution Thanks for getting back. I followed the instructions and got the "Mount disk, then unmount it. If it doesn't work then use "-L" tag note." However your link didn't mention how to mount the drive. So I'm putting it in here for the next guy. I followed space invaders 4 year old video. In terminal mkdir /tempxfs (Creates a temp folder to mount to) mount /dev/mdX (x being your drive letter). umount /tempxfs rmdir /tempxfs (Delete the temp folder we just created) run the XFS repair again. Start the array to see if it worked. You may still have "Drive disabled" with a little red X. To fix this: - Stop array (take note of drive configuration) - Select "no device" for effected drive(s). - Start array (Should now say "not installed") - Stop array and add the EXACT disk back in. - Start array which will then initiate a rebuild.
October 20, 20232 yr Author Welp... I take that all back... I was running the rebuild and both drives became "unmountable: Wrong or no file system". again... Not sure what to try next... I thought i fixed it.
October 20, 20232 yr Community Expert 5 hours ago, Maximus01701 said: run the XFS repair again You never mention if this worked (i.e. the drive was now mountable).
October 20, 20232 yr Author Yes, it worked and was doing fin until about 75% of the rebuild where both drives became unmountable again. So I then did it all over again and it worked... so running a parity check on it now.
October 20, 20232 yr Community Expert A bit worrying that the drives went unmountable during the rebuild if they were showing as OK before starting the rebuild. It is probably worth carefully checking the cabling (power and SATA) to the drives.
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