[Bug 883109] Re: Grub2: "grub-probe: warn: Discarding improperly nested partition"

Jeffrey Walton noloader at gmail.com
Wed Nov 2 07:37:25 UTC 2011 

$ sudo fdisk -l
[sudo] password for jeffrey: 

Disk /dev/sda: 164.7 GB, 164696555520 bytes
255 heads, 63 sectors/track, 20023 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000aeb54

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1           4       32098+  17  Hidden HPFS/NTFS
/dev/sda2               5       20024   160800769    5  Extended
Partition 2 does not end on cylinder boundary.
/dev/sda5               5        3921    31457280    7  HPFS/NTFS
/dev/sda6            3921        9143    41943040    7  HPFS/NTFS
/dev/sda7            9143       11754    20971520   83  Linux
/dev/sda8           11754       14365    20971520   83  Linux
/dev/sda9           14365       16976    20971520   83  Linux
/dev/sda10          16976       19587    20972544   83  Linux
/dev/sda11          19587       20024     3507200   82  Linux swap / Solaris

Disk /dev/sdb: 40.0 GB, 40000000000 bytes
255 heads, 63 sectors/track, 4863 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb9e6b9e6

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1        1306    10485760   a5  FreeBSD
Partition 1 does not end on cylinder boundary.
/dev/sdb2            1306        2611    10485760   a6  OpenBSD
Partition 2 does not end on cylinder boundary.
/dev/sdb3   *        2611        4863    18088960   bf  Solaris
Partition 3 does not end on cylinder boundary.
$

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https://bugs.launchpad.net/bugs/883109

Title:
  Grub2: "grub-probe: warn: Discarding improperly nested partition"

Status in “grub2” package in Ubuntu:
  New

Bug description:
  This machine does not have the horse power for VMs, so its got 9 OS in
  spread across 2 disks. On the second disk, OpenBSD, FreeBSD and
  Solaris are all primary (plus one unused primary).

  ===========================

  # cd /boot/
  # ls
  abi-2.6.38-12-generic         memtest86+_multiboot.bin
  config-2.6.38-12-generic      System.map-2.6.38-12-generic
  grub                          vmcoreinfo-2.6.38-12-generic
  initrd.img-2.6.38-12-generic  vmlinuz-2.6.38-12-generic
  memtest86+.bin
  # update-grub2
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Generating grub.cfg ...
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found linux image: /boot/vmlinuz-2.6.38-12-generic
  Found initrd image: /boot/initrd.img-2.6.38-12-generic
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found memtest86+ image: /boot/memtest86+.bin
  Found Windows Vista (loader) on /dev/sda1
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found Fedora release 14 (Laughlin) on /dev/sda10
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found Fedora release 15 (Lovelock) on /dev/sda8
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found Ubuntu 11.10 (11.10) on /dev/sda9
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos2).
  /usr/sbin/grub-probe: warn: Discarding improperly nested partition (hd1,openbsd10,msdos3).
  Found unknown Linux distribution on /dev/sdb1
  Found unknown Linux distribution on /dev/sdb14
  Found unknown Linux distribution on /dev/sdb17
  Found unknown Linux distribution on /dev/sdb5
  done
  root at germain:/boot#

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