[Bug 792167] Re: fdisk cannot read partition table on /dev/sda or /dev/sdb

[Roy Walker]

The "sudo fdisk /dev/sda" command does work, but the "w" option does
not resolve the re-installation problem.

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https://bugs.launchpad.net/bugs/792167

Title:
  fdisk cannot read partition table on /dev/sda or /dev/sdb

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  I need to re-install Ubuntu 11.04 to regain functionally of internal
  audio output.  Neither the desktop or the alternate install procedures
  recognize the old partitions.  I have Windows XP and Ubuntu 11.04
  running on my computer.  I have two hard drives with one FAT,  three
  NTFS, and one EXT4 partitions on the first drive and two NTFS, one
  EXT4, and one swap partition on the second drive.  Windows XP Disk
  Management reports that all partitions are healthy.  Ubuntu 11.04
  System Testing indicates that drives are working properly.  Both
  install programs recognize both hard drives and insist that new
  partitions must be created.   An upgrade of Ubuntu 11.04 is not
  allowed because the latest version is already on the computer.

  How can I re-install Ubuntu 11.04 without losing my NTFS and EXT4
  partitions except for the Ubuntu 11.04 root partition?