[Bug 1001076] Re: system fails to boot if btrfs has certain options in /etc/fstab

Ryan Tasson ryan at mittdev.com
Mon Sep 10 09:19:03 UTC 2012

*** This bug is a duplicate of bug 748340 ***

This is because the btrfsck tool doesn't support compression. Upon

fsck from util-linux 2.20.1
couldn't open because of unsupported option features (8).
fsck.btrfs: disk-io.c:679: open_ctree_fd: Assertion `!(1)' failed.
fsck: Warning... fsck.btrfs for device /dev/mapper/nogroanhomer-home exited with signal 6.

Knowing that, I've found the bug #748340; this is a dupe.

** This bug has been marked a duplicate of bug 748340
   btrfsck fails with "unsupported option features", must [ignore] to boot

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  system fails to boot if btrfs has certain options in /etc/fstab

Status in “btrfs-tools” package in Ubuntu:

Bug description:
  I have btrfs running on second  harddrive (Not the root partition). I
  use 'compress=lzo' and I have set 'pass' to '2' so that the OS will
  check the volume at boot time.

      # <file system> <mount point>   <type>  <options>       <dump>  <pass>
      UUID="abcdefg" /btrfs   btrfs   defaults,compress=lzo   0   2

  I am unsure if 'compress=lzo' has anything to do with this error.

  However, if I do this then Ubuntu fails to boot. The error presented
  on the screen is:

      "Serious errors were found while checking the disk drive for[/btrfs].
      "Press I to ignore, S to skip mounting, or M for manual recovery."

  The workaround is to edit /etc/fstab and set 'pass' to '0', which
  disables the fsck.

  (Assigning to btrfs-tools initially. Not sure if that is the correct

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: btrfs-tools 0.19+20100601-3ubuntu3
  ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
  Uname: Linux 3.2.0-24-generic x86_64
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  Date: Thu May 17 20:57:07 2012
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release Candidate amd64 (20091020.3)
  SourcePackage: btrfs-tools
  UpgradeStatus: Upgraded to precise on 2012-05-01 (16 days ago)

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