[Bug 972290] Re: grub-pc update fails with "writing GRUB to boot device failed"

[Tony Green]

Extra information. In /var/apt/term.log I see
/usr/sbin/grub-probe: error: cannot stat `/,'.

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https://bugs.launchpad.net/bugs/972290

Title:
  grub-pc update fails with "writing GRUB to boot device failed"

Status in “grub2” package in Ubuntu:
  Invalid

Bug description:
  update fails with the error above. this is a dual boot setup and
  windows 7 is on MBR and ubuntu is on an extended partition. purging
  and reinstalling all grub related packages and running $ grub-setup
  /dev/sda5 gives same error message:

  grub-setup: warn: Attempting to install GRUB to a partition-less disk or to a partition.  This is a BAD idea..
  grub-setup: warn: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
  grub-setup: error: will not proceed with blocklists.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: grub-pc 1.99-20ubuntu1
  ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
  Uname: Linux 3.2.0-21-generic x86_64
  ApportVersion: 2.0-0ubuntu3
  Architecture: amd64
  Date: Tue Apr  3 12:48:20 2012
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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