Hello, I had some random machine freezing events which I suspected was due to issues with a raid1 filesystem and kernel module crashes. I attempted to use the information available to get the filesystem into a good state where "btrfs check" and "btrfs scrub" would not have any errors, however I fear things have become worse.
The current state of things is that the filesystem won't mount at all now. % mount -r /dev/sda1 /data mount: /data: can't read superblock on /dev/sda1. and dmesg says: [15944.017629] BTRFS info (device sda1): disk space caching is enabled [15944.017632] BTRFS info (device sda1): has skinny extents [15944.024480] BTRFS info (device sda1): bdev /dev/sda1 errs: wr 0, rd 0, flush 0, corrupt 1, gen 0 [15944.024487] BTRFS info (device sda1): bdev /dev/sdb1 errs: wr 0, rd 0, flush 0, corrupt 4, gen 0 [15944.029292] BTRFS error (device sda1): parent transid verify failed on 628168376320 wanted 37601 found 37700 [15944.029466] BTRFS error (device sda1): parent transid verify failed on 628168376320 wanted 37601 found 37700 Other system information is: % uname -a Linux izen 4.18.0-16-generic #17-Ubuntu SMP Fri Feb 8 00:06:57 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux % btrfs --version btrfs-progs v4.16.1 % btrfs fi show Label: 'root' uuid: 65fd7f11-4f60-435f-928b-6d15f12bc417 Total devices 1 FS bytes used 101.75GiB devid 1 size 232.88GiB used 232.85GiB path /dev/nvme0n1p1 Label: 'data' uuid: d5e50511-3e31-4de6-ba37-c5841895be9f Total devices 2 FS bytes used 830.44GiB devid 1 size 1.82TiB used 669.03GiB path /dev/sda1 devid 2 size 1.82TiB used 817.06GiB path /dev/sdb1 % btrfs check /dev/sda1 Checking filesystem on /dev/sda1 UUID: d5e50511-3e31-4de6-ba37-c5841895be9f checking extents parent transid verify failed on 628168343552 wanted 28163 found 37700 parent transid verify failed on 628168343552 wanted 28163 found 37700 parent transid verify failed on 628168343552 wanted 28163 found 37700 parent transid verify failed on 628168343552 wanted 28163 found 37700 Ignoring transid failure bad block 628168343552 ERROR: errors found in extent allocation tree or chunk allocation checking free space cache cache and super generation don't match, space cache will be invalidated checking fs roots root 5 root dir 256 not found ERROR: errors found in fs roots found 528138240 bytes used, error(s) found total csum bytes: 0 total tree bytes: 1785856 total fs tree bytes: 1064960 total extent tree bytes: 81920 btree space waste bytes: 606983 file data blocks allocated: 215220224 referenced 215220224 % btrfs rescue super-recover /dev/sda1 All supers are valid, no need to recover Where do I go from here? Regards, Glenn
