[Bug 1020921] [NEW] os-prober fails to detect Ubuntu on md0 (software RAID1)

[YannUbuntu]

Public bug reported:

Asus Netbook 900A (CPU: Atom, RAM 1 GB)
Debian GNU/Linux 4.0 installed on sda1
Ubuntu 12.04 installed on md0

As seen on this Boot-Repair log (http://paste.ubuntu.com/1074461), os-
prober executed from a 12.04 live-CD returns:

/dev/sda1:Debian GNU/Linux (4.0):Debian:linux
/dev/sda2:unknown Linux distribution:Linux:linux

when it should return:

/dev/sda1:Debian GNU/Linux (4.0):Debian:linux
/dev/md0:Ubuntu 12.04 LTS (12.04):Ubuntu:linux

** Affects: os-prober (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1020921

Title:
  os-prober fails to detect Ubuntu on md0 (software RAID1)

Status in “os-prober” package in Ubuntu:
  New

Bug description:
  Asus Netbook 900A (CPU: Atom, RAM 1 GB)
  Debian GNU/Linux 4.0 installed on sda1
  Ubuntu 12.04 installed on md0

  As seen on this Boot-Repair log (http://paste.ubuntu.com/1074461), os-
  prober executed from a 12.04 live-CD returns:

  /dev/sda1:Debian GNU/Linux (4.0):Debian:linux
  /dev/sda2:unknown Linux distribution:Linux:linux

  when it should return:

  /dev/sda1:Debian GNU/Linux (4.0):Debian:linux
  /dev/md0:Ubuntu 12.04 LTS (12.04):Ubuntu:linux

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