[Bug 1265402] Re: Unity calls mapdevfs with wrong number of args on btrfs raid1

[Huygens]

Actually my "patch" did not work :-( I got in rescue mode while
rebooting...

I think I will create dedicated "/boot" partition on top of MD instead
of using Btrfs. This is quite disappointing! I wanted Btrfs because of
its checksum+RAID combination. I will have to rely on plain "old"
MD+ext4...

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Title:
  Unity calls mapdevfs with wrong number of args on btrfs raid1

Status in “ubiquity” package in Ubuntu:
  Triaged

Bug description:
  Trying to install Saucy on a KVM vm. The filesystem is /vda1 mounted
  on /boot, vda2 and vdb1 ate btrfs raid1 swap is on vda. Installer
  always says it can't install bootloader on vda, pick another device.
  But no device works. I'v tried many time with different configurations
  of the virtual disks, always ends the same.

  Thanks,
  Barry

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: ubiquity 2.15.26
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.336ubuntu1
  Date: Wed Jan  1 19:19:46 2014
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MarkForUpload: True
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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