[Bug 1117665] Re: Runing live cd from usb fails when a hibernated windows partition exists

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~crass/casper/+git/casper/+merge/453078

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https://bugs.launchpad.net/bugs/1117665

Title:
  Runing live cd from usb fails when a hibernated windows partition
  exists

Status in casper package in Ubuntu:
  New

Bug description:
  When booting the live cd from a usb flash stick, the kernel needs to
  be given the file path of the iso in the "iso-scan/filename" kernel
  parameter.  Then the scripts in the initrd will search all partitions
  until it finds the iso to use as its root filesystem.  In order to
  look into the filesystem on the partition to check for the iso, the
  filesystems must be mounted.  So potentially all filesystems will get
  mounted.

  When a hibernated windows partition exists the ntfs3g mounter will
  refuse to mount the partition in read/write mode and returns an error.
  This will cause the search script to die and the boot process to stop,
  bringing the system to a debugging shell in the initrd.

  The source of the problem appears to be on line 30 of /scripts/casper-
  premount/20iso_scan in the initrd.  The line is "find_path
  "${iso_path}" /isodevice rw" and we can see that the filesystems are
  mounted read/write, which I suspect is unnecessary since nothing
  should be written to the filesystem anyway (we are searching for a
  readonly iso).

  This bug essentially prevents usage of the live cd from a usb stick
  when there is a hibernated windows partition.

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