July 3, 20224 yr Hey All I'm definitely still learning Unraid / Servers etc. I was trying install a new m.2 drive in my cache pool folowing instructions from the link below. in the process it seems I have messed up the filesystem on the drive. The original drives are back in my system. I've been exploring the forum all night and tried the following commands: btrfs-select-super -s 1 /dev/nvme1n1 No valid Btrfs found on /dev/nvme1n1 Open ctree failed mount -o rescue=all,ro /dev/nvme1n1 /temp mount: /temp: wrong fs type, bad option, bad superblock on /dev/nvme1n1, missing codepage or helper program, or other error. mount -o degraded,rescue=all,ro /dev/sdX1 /temp mount: /temp: wrong fs type, bad option, bad superblock on /dev/nvme1n1, missing codepage or helper program, or other error. btrfs check --repair /dev/sdX1 Errors out Its not the end of the world if I loose the data it was just my appdata folder, I would reather not loose my plex server if possible but if that has to happen it won't be the end of my world. Again sorry for possible extreme noobness unraid-diagnostics-20220702-2312.zip Edited July 3, 20224 yr by DEB
July 3, 20224 yr Community Expert Solution 3 hours ago, DEB said: btrfs-select-super -s 1 /dev/nvme1n1 If you think the device was wiped the correct command would be: btrfs-select-super -s 1 /dev/nvme1n1p1
July 3, 20224 yr Author That go it. Thank you very much. I guess i was missing the p1. is that to represent partition 1??
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