[Bug 687501] Re: when installer is multipath aware, grub fails to install

[Colin Watson]

That subsequent grub2 upload was, but it turns out it needed a lupin
upload as well which I forgot.  That's currently waiting for approval.

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https://bugs.launchpad.net/bugs/687501

Title:
  when installer is multipath aware, grub fails to install

Status in OEM Priority Project:
  New
Status in “grub2” package in Ubuntu:
  Fix Released
Status in “grub2” source package in Lucid:
  Fix Committed
Status in “grub2” source package in Maverick:
  Fix Committed

Bug description:
  Binary package hint: debian-installer

  This was discovered on the Intel IMS which uses a MP SAS Array
  in ALUA mode, Active/Standby.

  To reproduce:
  1) ubuntu 10.4.1 server amd64
  2) grub prompt# install disk-detect/multipath/enable=true
  3) It doesn't matter how you partition the disks or if one or both paths are up.

  Failure:

  grub bails out, logs attached
  Dec  9 03:25:45 debconf: --> SUBST grub-installer/progress/step_install_loader BOOTDEV /dev/sda
  Dec  9 03:25:45 debconf: Adding [BOOTDEV] -> [/dev/sda]
  Dec  9 03:25:45 debconf: <-- 0
  Dec  9 03:25:45 debconf: --> PROGRESS INFO grub-installer/progress/step_install_loader
  Dec  9 03:25:45 debconf: <-- 0 OK
  Dec  9 03:25:45 grub-installer: info: Installing grub on '/dev/sda'
  Dec  9 03:25:45 grub-installer: info: grub-install supports --no-floppy
  Dec  9 03:25:45 grub-installer: info: Running chroot /target grub-install  --no-floppy --force "/dev/sda"
  Dec  9 03:25:45 grub-installer: /usr/sbin/grub-probe: error:
  Dec  9 03:25:45 grub-installer:  
  Dec  9 03:25:45 grub-installer: cannot find a GRUB drive for /dev/mapper/mpath0p1.  Check your device.map
  Dec  9 03:25:45 grub-installer: .
  Dec  9 03:25:45 grub-installer: You have a memory leak (not released memory pool):
  Dec  9 03:25:45 grub-installer: 
  Dec  9 03:25:45 grub-installer:  [0x25f8180]
  Dec  9 03:25:45 grub-installer: 
  Dec  9 03:25:45 grub-installer: Auto-detection of a filesystem module failed.
  Dec  9 03:25:45 grub-installer: Please specify the module with the option `--modules' explicitly.
  Dec  9 03:25:45 grub-installer: error: Running 'grub-install  --no-floppy --force "/dev/sda"' failed.
  Dec  9 03:25:45 debconf: --> SUBST grub-installer/grub-install-failed BOOTDEV /dev/sda
  Dec  9 03:25:45 debconf: Adding [BOOTDEV] -> [/dev/sda]
  Dec  9 03:25:45 debconf: <-- 0
  Dec  9 03:25:45 debconf: --> INPUT critical grub-installer/grub-install-failed