johnnykilo Posted December 7, 2020 Share Posted December 7, 2020 I have 2 caches (1 120GB OCZ SSD and 1 480GB PNY SSD). I think the PNY started having issues a few weeks back (sorry cant remember which one). Now I am getting the 2 errors below on my drives. My appdata is cache only (which I read to be best practice on these forums I believe) so I need to try to get the data back if possible. There isnt anything critical on there but I would prefer not to have to redo all of my dockers. Diagnostics attached. Unmountable: No file system (no btrfs devices) Device is part of cache pool jordan-diagnostics-20201206-2001.zip Quote Link to comment
JorgeB Posted December 7, 2020 Share Posted December 7, 2020 Constant errors on one of the cache devices: Dec 6 18:57:07 Jordan kernel: sd 1:0:0:0: [sdb] tag#12 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00 Dec 6 18:57:07 Jordan kernel: sd 1:0:0:0: [sdb] tag#12 CDB: opcode=0x28 28 00 00 00 00 40 00 00 01 00 Dec 6 18:57:07 Jordan kernel: print_req_error: I/O error, dev sdb, sector 64 Dec 6 18:57:07 Jordan kernel: sd 1:0:0:0: [sdb] tag#27 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00 Dec 6 18:57:07 Jordan kernel: sd 1:0:0:0: [sdb] tag#27 CDB: opcode=0x28 28 00 00 00 00 40 00 00 20 00 Dec 6 18:57:07 Jordan kernel: print_req_error: I/O error, dev sdb, sector 64 Dec 6 18:57:07 Jordan kernel: sd 1:0:0:0: [sdb] tag#28 UNKNOWN(0x2003) Result: hostbyte=0x04 driverbyte=0x00 Dec 6 18:57:07 Jordan kernel: sd 1:0:0:0: [sdb] tag#28 CDB: opcode=0x28 28 00 00 00 00 40 00 00 08 00 Dec 6 18:57:07 Jordan kernel: print_req_error: I/O error, dev sdb, sector 64 You can try these options to recover the data, then also see here for better pool monitoring. Quote Link to comment
johnnykilo Posted December 8, 2020 Author Share Posted December 8, 2020 So i tried that and got the message below. fdisk -l doesnt show sdb. Restore also didnt work. Per your instructions I also tried sdc1 as well since my cache is a pool. I was able to restore some data from sdc using btrfs restore Thanks, root@Jordan:~# mount -o usebackuproot,ro /dev/sdb1 /x mount: /x: can't read superblock on /dev/sdb1. btrfs restore -v /dev/sdb1 /mnt/disk2/restore No valid Btrfs found on /dev/sdb1 Could not open root, trying backup super No valid Btrfs found on /dev/sdb1 Could not open root, trying backup super No valid Btrfs found on /dev/sdb1 Could not open root, trying backup super root@Jordan:~# mount -o usebackuproot,ro /dev/sdc1 /x mount: /x: wrong fs type, bad option, bad superblock on /dev/sdc1, missing codepage or helper program, or other error. root@Jordan:~# mount -o degraded,usebackuproot,ro /dev/sdb1 /x mount: /x: can't read superblock on /dev/sdb1. root@Jordan:~# mount -o degraded,usebackuproot,ro /dev/sdc1 /x mount: /x: wrong fs type, bad option, bad superblock on /dev/sdc1, missing codepage or helper program, or other error. Quote Link to comment
johnnykilo Posted December 14, 2020 Author Share Posted December 14, 2020 Anybody? Quote Link to comment
JorgeB Posted December 14, 2020 Share Posted December 14, 2020 Like mentioned in the FAQ if the options there don't work best bet is to use the btrfs mailing list and/or their IRC channel for help. Quote Link to comment
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