[Bug 816475] Re: package grub-pc 1.99~rc1-13ubuntu3 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 139

[Pedro Monteiro]

Found the reason for the problem and a workaround.

The problem:

The problem is having a RAID partition as the last partition of the device. Because the superblock location of a partition that is the last on the device and the superblock location of an entire device is the same (both on the end of the device) the superblock metadata should be used to find which RAID device it's related to.
Apparently grub-probe misunderstands this info. In my case it was assuming I had a full hard drive RAID device instead of a single partition at the end.

The workaround:

Having found this erratic behavior, I changed my disk partition layout so that the RAID partition wouldn't be at the end of the disk. Now, the last partition was the swap partition.
That change itself didn't work because the mkswap command didn't erase the raid superblock data still in the partition at the end of the drive. I had to do a "mdadm --zero-superblock" at the disk device so that the only valid superblock would be the RAID partition superblock.

After all this, I finally got grub-probe to detect my configuration
successfully.

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Title:
  package grub-pc 1.99~rc1-13ubuntu3 failed to install/upgrade:
  ErrorMessage: subprocess installed post-installation script returned
  error exit status 139

Status in “grub2” package in Ubuntu:
  New

Bug description:
  I just upgraded from maverick to natty. Before the upgrade, update-
  grub was working, but now it fails with:

  error: superfluous RAID member (2 found).
  error: superfluous RAID member (3 found).
  error: superfluous RAID member (3 found).
  error: superfluous RAID member (3 found).
  error: superfluous RAID member (3 found).
  error: superfluous RAID member (3 found).
  error: superfluous RAID member (2 found).
  Segmentation fault

  ProblemType: Package
  DistroRelease: Ubuntu 11.04
  Package: grub-pc 1.99~rc1-13ubuntu3
  ProcVersionSignature: Ubuntu 2.6.35-30.56-generic 2.6.35.13
  Uname: Linux 2.6.35-30-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Tue Jul 26 18:11:25 2011
  ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 139
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-30-generic root=UUID=632f9a08-e68c-4de4-9702-4bc1a16b1519 ro quiet splash
  SourcePackage: grub2
  Title: package grub-pc 1.99~rc1-13ubuntu3 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 139
  UpgradeStatus: Upgraded to natty on 2011-07-26 (0 days ago)

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