MatSalamon Posted January 24 Share Posted January 24 (edited) Good morning all, Hope you are well. Earlier this morning I attempted to remove a cache drive from my pool, and then re-added it but after doing so I see the following error: Unmountable: No pool uuid Any help would be greatly appreciated, as I don't want to attempt any further steps which might create an even bigger issue. [email protected]:~# btrfs-select-super -s 1 /dev/nvme1n1 No valid Btrfs found on /dev/nvme1n1 ERROR: open ctree failed [email protected]:~# btrfs-select-super -s 1 /dev/nvme0n1 No valid Btrfs found on /dev/nvme0n1 ERROR: open ctree failed [email protected]:~# Thank you for your time! phobos-diagnostics-20230124-0951.zip Edited January 24 by MatSalamon Added new information Quote Link to comment
JorgeB Posted January 24 Share Posted January 24 Post the output of btrfs-select-super -s 1 /dev/nvme1n1p1 and after that one btrfs fi show Quote Link to comment
MatSalamon Posted January 24 Author Share Posted January 24 Hi @JorgeB, thanks for the prompt response, please see outputs below: [email protected]:~# btrfs-select-super -s 1 /dev/nvme1n1p1 warning, device 2 is missing using SB copy 1, bytenr 67108864 [email protected]:~# btrfs fi show warning, device 2 is missing Label: none uuid: 26e0b887-b92c-4df2-ae99-87f56a96103b Total devices 2 FS bytes used 79.43GiB devid 1 size 465.76GiB used 138.03GiB path /dev/nvme1n1p1 *** Some devices missing [email protected]:~# Quote Link to comment
JorgeB Posted January 24 Share Posted January 24 Did you also wipe the other device? Logs only show the one above, post output of: btrfs-select-super -s 1 /dev/nvme0n1p1 and then btrfs fi show Quote Link to comment
MatSalamon Posted January 24 Author Share Posted January 24 I certainly don't recall wiping any the the devices, they were removed from the cache pool, and then re-added without formatting. [email protected]:~# btrfs-select-super -s 1 /dev/nvme0n1p1 using SB copy 1, bytenr 67108864 [email protected]:~# btrfs fi show Label: none uuid: 26e0b887-b92c-4df2-ae99-87f56a96103b Total devices 2 FS bytes used 79.43GiB devid 1 size 465.76GiB used 138.03GiB path /dev/nvme1n1p1 devid 2 size 1.82TiB used 138.03GiB path /dev/nvme0n1p1 [email protected]:~# Quote Link to comment
Solution JorgeB Posted January 24 Solution Share Posted January 24 Pool appears to be reset but to make sure, stop array, unassign all pool devices, start array, stop array, re-assign all pool devices, start array, pool should mount now P.S. note that you can only remove a device from a redundant pool, and base don the data usage that is not one. Quote Link to comment
MatSalamon Posted January 24 Author Share Posted January 24 Fantastic, thank you @JorgeB, this has resolved my issue. Appreciate your support here very much! 1 Quote Link to comment
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