Btrfs ran into this issue a couple of times on this partition, always falling back to read-only.
A btrfs check produced the following log entries: Jan 5 18:44:01 mothership kernel: [1451559.293128] BTRFS warning (device dm-19): checksum error at logical 105529344 on dev /dev/mapper/VGinternal02-root--backup, sector 206112: metadata leaf (level 0) in tree 7 Jan 5 18:44:01 mothership kernel: [1451559.293134] BTRFS warning (device dm-19): checksum error at logical 105529344 on dev /dev/mapper/VGinternal02-root--backup, sector 206112: metadata leaf (level 0) in tree 7 Jan 5 18:44:01 mothership kernel: [1451559.293140] BTRFS error (device dm-19): bdev /dev/mapper/VGinternal02-root--backup errs: wr 0, rd 0, flush 0, corrupt 1, gen 0 Jan 5 18:44:01 mothership kernel: [1451559.293144] BTRFS error (device dm-19): unable to fixup (regular) error at logical 105529344 on dev /dev/mapper/VGinternal02-root--backup Jan 5 18:44:02 mothership kernel: [1451559.601334] BTRFS warning (device dm-19): checksum error at logical 105545728 on dev /dev/mapper/VGinternal02-root--backup, sector 206144: metadata leaf (level 0) in tree 7 Jan 5 18:44:02 mothership kernel: [1451559.601336] BTRFS warning (device dm-19): checksum error at logical 105545728 on dev /dev/mapper/VGinternal02-root--backup, sector 206144: metadata leaf (level 0) in tree 7 Jan 5 18:44:02 mothership kernel: [1451559.601338] BTRFS error (device dm-19): bdev /dev/mapper/VGinternal02-root--backup errs: wr 0, rd 0, flush 0, corrupt 2, gen 0 Jan 5 18:44:02 mothership kernel: [1451559.601352] BTRFS error (device dm-19): unable to fixup (regular) error at logical 105545728 on dev /dev/mapper/VGinternal02-root--backup As the content on the disk did not change since I converted from ext4 to btrfs, I think that the inconsistency must have been produced by btrfs. To be sure, I am now also checking the underlying partition for errors - it is a raid 1 with 3 active disks and lvm on top of it. So far neither dm nor lvm reported errors. Then I will backup to tape and buld a new btrfs partition from scratch. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1654057 Title: btrfs balance crashed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/btrfs-tools/+bug/1654057/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
