Bug#550083: grub-pc: Grub2 has trouble with lvm on md raid1

Philip Armstrong phil at kantaka.co.uk
Wed Oct 7 13:26:28 UTC 2009


Package: grub-pc
Version: 1.97~beta4-1
Severity: normal

Grub2 fails to boot directly into my root on LVM on md raid1 setup.

At boot time, I get

Grub loading, followed by a pause, then a "biosdisk read error" is
printed, followed by another pause (10s) or so, then "entering rescue
mode", another pause then finally the grub menu appears on screen.

So, grub is successfully booting, but more by luck than judgement it
seems!

This appears to be launchpad bug 396564, but there's not much of use
there, except for confirmation of the bug from other sources.

Happy to try any debugging suggestions.

Phil

-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/mapper/Kantaka-Root / ext4 rw,relatime,errors=remount-ro,user_xattr,commit=20,barrier=1,data=ordered 0 0
/dev/mapper/Kantaka-Backup /backup ext4 rw,relatime,user_xattr,commit=20,barrier=1,data=ordered 0 0
/dev/mapper/Kantaka-Home /home ext4 rw,relatime,user_xattr,commit=20,barrier=1,data=ordered 0 0
/dev/sda2 /mnt/windows fuseblk rw,noatime,user_id=0,group_id=0,allow_other,blksize=4096 0 0
*********************** END /proc/mounts

*********************** BEGIN /boot/grub/device.map
(fd0)	/dev/fd0
(hd0)	/dev/sda
(hd1)	/dev/sdb
*********************** END /boot/grub/device.map

*********************** BEGIN /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
set default=0
insmod raid
insmod mdraid
insmod lvm
insmod ext2
set root=(Kantaka-Root)
search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  insmod gfxterm
  insmod vbe
  if terminal_output gfxterm ; then true ; else
    # For backward compatibility with versions of terminal.mod that don't
    # understand terminal_output
    terminal gfxterm
  fi
fi
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
insmod raid
insmod mdraid
insmod lvm
insmod ext2
set root=(Kantaka-Root)
search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
insmod png
if background_image /boot/grub/moreblue-orbit-grub.png ; then
  set color_normal=black/black
  set color_highlight=magenta/black
else
  set menu_color_normal=cyan/blue
  set menu_color_highlight=white/blue
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry "Debian GNU/Linux, Linux 2.6.30-2-686" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux	/boot/vmlinuz-2.6.30-2-686 root=/dev/mapper/Kantaka-Root ro quiet 
	initrd	/boot/initrd.img-2.6.30-2-686
}
menuentry "Debian GNU/Linux, Linux 2.6.30-2-686 (recovery mode)" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux	/boot/vmlinuz-2.6.30-2-686 root=/dev/mapper/Kantaka-Root ro single quiet
	initrd	/boot/initrd.img-2.6.30-2-686
}
menuentry "Debian GNU/Linux, Linux 2.6.30-1-686" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux	/boot/vmlinuz-2.6.30-1-686 root=/dev/mapper/Kantaka-Root ro quiet 
	initrd	/boot/initrd.img-2.6.30-1-686
}
menuentry "Debian GNU/Linux, Linux 2.6.30-1-686 (recovery mode)" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux	/boot/vmlinuz-2.6.30-1-686 root=/dev/mapper/Kantaka-Root ro single quiet
	initrd	/boot/initrd.img-2.6.30-1-686
}
menuentry "Debian GNU/Linux, Linux 2.6.29-2-686" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux	/boot/vmlinuz-2.6.29-2-686 root=/dev/mapper/Kantaka-Root ro quiet 
	initrd	/boot/initrd.img-2.6.29-2-686
}
menuentry "Debian GNU/Linux, Linux 2.6.29-2-686 (recovery mode)" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux	/boot/vmlinuz-2.6.29-2-686 root=/dev/mapper/Kantaka-Root ro single quiet
	initrd	/boot/initrd.img-2.6.29-2-686
}
menuentry "Debian GNU/Linux, Linux 2.6.29-1-686" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux	/boot/vmlinuz-2.6.29-1-686 root=/dev/mapper/Kantaka-Root ro quiet 
	initrd	/boot/initrd.img-2.6.29-1-686
}
menuentry "Debian GNU/Linux, Linux 2.6.29-1-686 (recovery mode)" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux	/boot/vmlinuz-2.6.29-1-686 root=/dev/mapper/Kantaka-Root ro single quiet
	initrd	/boot/initrd.img-2.6.29-1-686
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_memtest86 ###
menuentry "Memory test (memtest86)" {
	linux	/boot/memtest86.bin
}
### END /etc/grub.d/20_memtest86 ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux16	/boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
	insmod raid
	insmod mdraid
	insmod lvm
	insmod ext2
	set root=(Kantaka-Root)
	search --no-floppy --fs-uuid --set 542b2728-4371-4c5d-b87b-db3448fca988
	linux16	/boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Professional (on /dev/sda2)" {
	insmod ntfs
	set root=(hd0,2)
	search --no-floppy --fs-uuid --set bae4d603e4d5c235
	drivemap -s (hd0) ${root}
	chainloader +1
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
*********************** END /boot/grub/grub.cfg

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.30-2-686 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_GB.UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages grub-pc depends on:
ii  debconf [debconf-2.0]       1.5.27       Debian configuration management sy
ii  grub-common                 1.97~beta4-1 GRand Unified Bootloader, version 
ii  libc6                       2.9-27       GNU C Library: Shared libraries
ii  ucf                         3.0022       Update Configuration File: preserv

grub-pc recommends no packages.

Versions of packages grub-pc suggests:
ii  desktop-base                  5.0.5      common files for the Debian Deskto
ii  genisoimage                   9:1.1.9-1  Creates ISO-9660 CD-ROM filesystem

-- debconf information:
  grub2/kfreebsd_cmdline:
* grub2/linux_cmdline: quiet
* grub-pc/chainload_from_menu.lst: true
  grub-pc/postrm_purge_boot_grub: false
  grub2/kfreebsd_cmdline_default: quiet
* grub2/linux_cmdline_default:
* grub-pc/install_devices: /dev/sda, /dev/sdb
* grub-pc/linux_cmdline:
  grub-pc/kopt_extracted: false





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