[Bug 880645] Re: "btrfs device delete /dev/sdaX /" fails with error "ERROR: error removing the device '/dev/sdaX'"

[jperez]

Suffering same problem with 4 disk setup with raid1 metadata and raid0
data. Enough free space on filesystem, added a fourth disk to replace
one with relocate pending sectors (only 56 to be exact, on a 1.5 TB
disk), tried to delete the bad one and no luck. System exercices disks a
couple of hours and pop... error removing device.

I'm actually concerned with the old version of btrfs-tools, it's btrfs
command doesn't support scrub etc, that ships with 11.10 and ¡12.04 same
version! So waiting a month won't update the tools.    :-/

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https://bugs.launchpad.net/bugs/880645

Title:
  "btrfs device delete /dev/sdaX /" fails with error "ERROR: error
  removing the device '/dev/sdaX'"

Status in “btrfs-tools” package in Ubuntu:
  Confirmed

Bug description:
  What I did to cause this:

  Installed ubuntu using btrtfs root.
  Added a device with 'btrfs device add /dev/sda9 /'
  Balanced the file system with 'btrfs filesystem balance /'
  Tried to remove a device with 'btrfs device delete /dev/sda9 /'. Noticed that I got the error "ERROR: error removing the device '/dev/sda9'".

  (Unfortunately, I'm not sure how to get more information on the
  problem.)

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: btrfs-tools 0.19+20100601-3ubuntu3
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic x86_64
  NonfreeKernelModules: nvidia wl
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  Date: Mon Oct 24 00:44:42 2011
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111010)
  ProcEnviron:
   LC_CTYPE=C
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/zsh
  SourcePackage: btrfs-tools
  UpgradeStatus: No upgrade log present (probably fresh install)

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