[Bug 1266190] Re: partman fails to overwrite an already existing filesystem with btrfs

[Chris Samuel]

** Tags added: kubuntu

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https://bugs.launchpad.net/bugs/1266190

Title:
  partman fails to overwrite an already existing filesystem with btrfs

Status in “grub-installer” package in Ubuntu:
  New

Bug description:
  When trying the current daily install image for Kubuntu 14.04 I found
  that when I tried to overwrite an old install that had ext4 on
  /dev/sda6 with a new one with btrfs on /dev/sda6 it would keep telling
  me that the creation of /dev/sda6 had failed.

  Looking at /var/log/syslog it's because mkfs.btrfs is detecting the
  existence of an ext4 filesystem and refusing to overwrite it unless it
  is passed the -f flag.

  In the end I had to dd over the start of /dev/sda6 from /dev/zero to
  enable the install to work.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ubiquity 2.17.3
  ProcVersionSignature: Ubuntu 3.12.0-7.15-generic 3.12.4
  Uname: Linux 3.12.0-7-generic x86_64
  ApportVersion: 2.12.7-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.336ubuntu1
  CurrentDesktop: KDE
  Date: Sun Jan  5 23:02:33 2014
  InstallCmdLine: file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  LiveMediaBuild: Kubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140105)
  MarkForUpload: True
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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