[Bug 726021] Re: update-grub handles vg names with dashes incorrectly

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: grub2 (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/726021

Title:
  update-grub handles vg names with dashes incorrectly

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: grub2

  When update-grub is probing for bootable partitions from logical
  volumes, it creates incorrect menu entries if the volume group names
  have dashes in them. Apparently the parameter format for the "set root
  ='(vg-lv)'" should be exactly the same as the device node name in
  /dev/mapper, or /dev/mapper/vg-lv in the above case. However, for a
  volume group called "vg-0" having a logical volume "root", the dash
  gets sorta-escaped so that the mapper node path is /dev/mapper/vg--
  0-root; update-grub still puts '(vg-0-root)' as the root parameter
  however. This causes the menu entries to become unbootable, and if the
  grub configuration itself resides on such an lvm volume, the whole
  system becomes unbootable.

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