On Tue, Mar 27, 2012 at 4:57 AM, Christoph Groth <cwg@xxxxxxxx> wrote: > I have a freshly installed system with btrfs as the root file system. > The machine is running linux 3.2. The raid1 btrfs file system lives on > two new hard drives. > > About one day after installation the following message appeared in > kern.log. There were no other errors. > > root@mim:/var/log# grep 'btrfs.*fail' kern.log > Mar 27 01:07:46 mim kernel: [ 6480.233861] btrfs csum failed ino 453509 off 1495040 csum 3301532933 private 4156998194 > Mar 27 01:07:46 mim kernel: [ 6480.234470] btrfs csum failed ino 453509 off 1499136 csum 1873118812 private 3512102188 > Mar 27 01:07:46 mim kernel: [ 6480.234572] btrfs csum failed ino 453509 off 1503232 csum 1034640717 private 2041007647 > Mar 27 01:07:46 mim kernel: [ 6480.234670] btrfs csum failed ino 453509 off 1507328 csum 889729013 private 2342095239 > Mar 27 01:07:46 mim kernel: [ 6480.237977] btrfs csum failed ino 453509 off 1503232 csum 1518679450 private 2041007647 > Mar 27 01:07:46 mim kernel: [ 6480.238149] btrfs csum failed ino 453509 off 1507328 csum 889729013 private 2342095239 > Mar 27 01:07:46 mim kernel: [ 6480.238330] btrfs csum failed ino 453509 off 1495040 csum 3234580989 private 4156998194 > Mar 27 01:07:46 mim kernel: [ 6480.238447] btrfs csum failed ino 453509 off 1499136 csum 1873118812 private 3512102188 > Mar 27 01:07:46 mim kernel: [ 6480.243873] btrfs csum failed ino 453509 off 1503232 csum 2184012753 private 2041007647 > Mar 27 01:07:46 mim kernel: [ 6480.243962] btrfs csum failed ino 453509 off 1507328 csum 240604621 private 2342095239 > > inode 453509 belongs to a file installed by dpkg > > root@mim:/# find / -inum 453509 -ls > 453509 1976 -rw-r--r-- 1 root root 2020832 Mar 7 21:11 /usr/lib/libreoffice/basis3.4/program/libsblx.so > > That file seems to be ok, there are no errors when re-reading it. > > A scrub done the morning after the incident also didn't find any > problems: > > root@mim:/home/cwg# btrfs scrub status / > scrub status for 2da00153-f9ea-4d6c-a6cc-10c913d22686 > scrub started at Tue Mar 27 10:37:49 2012 and finished after 3921 seconds > total bytes scrubbed: 550.20GB with 0 errors If btrfs is able to find a good copy, it will fix the bad copy automatically. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
