Bug#586447: grub-pc: grub-probe can't find / (on lvm setup)

Yves-Alexis Perez corsac at debian.org
Sat Jun 19 15:59:14 UTC 2010


Package: grub-pc
Version: 1.98-1
Severity: normal

Hey,

I'm running a squeeze box, and noticed on trying to install latest 2.6.34
kernel (from experimental) that grub was having problem finding my /:

Setting up linux-image-2.6.34-1-amd64 (2.6.34-1~experimental.2) ...
Running depmod.
Running update-initramfs.
update-initramfs: Generating /boot/initrd.img-2.6.34-1-amd64
Running update-grub.
/usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?).
User postinst hook script [update-grub] exited with value 1
dpkg: error processing linux-image-2.6.34-1-amd64 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 linux-image-2.6.34-1-amd64
E: Sub-process /usr/bin/dpkg returned an error code (1)


My setup is an lvm volume for / and /home, with a /boot outside:

corsac at fitz: grep -v '^#' /etc/fstab
proc            /proc           proc    defaults        0       0
/dev/mapper/fitz-root /               ext3    defaults,errors=remount-ro 0       1
UUID=c43ffb58-075e-4b77-bee1-cd394c9abf02       /boot           ext3 defaults        0       2
/dev/mapper/fitz-home /home           ext3    defaults        0       2
/dev/mapper/fitz-swap none            swap    sw              0       0
/dev/scd0       /media/cdrom0   udf,iso9660 user,noauto     0       0

For now I can still boot previous kernels, but having an half installed one
and no way to run update-grub concerns me a little.

Verbose output doesn't seem to be helpful:

corsac at fitz: sudo grub-probe -v /
grub-probe: info: the size of hd0 is 976773168.
grub-probe: info: the size of hd0 is 976773168.
grub-probe: info: the size of hd0 is 976773168.
grub-probe: info: the size of hd0 is 976773168.
grub-probe: info: the size of hd0 is 976773168.
grub-probe: info: the size of hd0 is 976773168.
grub-probe: info: the size of hd0 is 976773168.
grub-probe: info: the size of hd0 is 976773168.
grub-probe: info: the size of hd0 is 976773168.
grub-probe: info: changing current directory to /dev.
grub-probe: info: changing current directory to snd.
grub-probe: info: changing current directory to by-path.
grub-probe: info: changing current directory to net.
grub-probe: info: changing current directory to shm.
grub-probe: info: changing current directory to fitz.
grub-probe: info: changing current directory to mapper.
grub-probe: info: changing current directory to usb.
grub-probe: info: changing current directory to disk.
grub-probe: info: changing current directory to by-uuid.
grub-probe: info: changing current directory to by-path.
grub-probe: info: changing current directory to by-id.
grub-probe: info: changing current directory to block.
grub-probe: info: changing current directory to dri.
grub-probe: info: changing current directory to bsg.
grub-probe: info: changing current directory to bus.
grub-probe: info: changing current directory to usb.
grub-probe: info: changing current directory to 005.
grub-probe: info: changing current directory to 004.
grub-probe: info: changing current directory to 003.
grub-probe: info: changing current directory to 002.
grub-probe: info: changing current directory to 001.
grub-probe: info: changing current directory to char.
grub-probe: info: changing current directory to pts.
grub-probe: info: changing current directory to input.
grub-probe: info: changing current directory to by-path.
grub-probe: info: changing current directory to by-id.
grub-probe: error: cannot find a device for / (is /dev mounted?).

If you need more info, please ask.

Cheers,
--
Yves-Alexis

-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/mapper/fitz-root / ext3 rw,relatime,errors=remount-ro,data=ordered 0 0
/dev/sda1 /boot ext3 rw,relatime,errors=continue,data=ordered 0 0
/dev/dm-2 /home ext3 rw,relatime,errors=continue,data=ordered 0 0
*********************** END /proc/mounts

*********************** BEGIN /boot/grub/device.map
(hd0)	/dev/sda
*********************** 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 ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ ${prev_saved_entry} ]; then
  set saved_entry=${prev_saved_entry}
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z ${boot_once} ]; then
    saved_entry=${chosen}
    save_env saved_entry
  fi
}
insmod lvm
insmod ext2
set root='(fitz-root)'
search --no-floppy --fs-uuid --set 7d5892db-f57b-49c9-bac6-ae5176d56481
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=1600x1200
  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
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
set locale_dir=($root)/grub/locale
set lang=fr
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
insmod png
if background_image /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, with Linux 2.6.34-1-amd64" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
	echo	Loading Linux 2.6.34-1-amd64 ...
	linux	/vmlinuz-2.6.34-1-amd64 root=/dev/mapper/fitz-root ro quiet acpi_enforce_resources=lax 
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.34-1-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.34-1-amd64 (recovery mode)" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
	echo	Loading Linux 2.6.34-1-amd64 ...
	linux	/vmlinuz-2.6.34-1-amd64 root=/dev/mapper/fitz-root ro single quiet acpi_enforce_resources=lax
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.34-1-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.32-5-amd64" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
	echo	Loading Linux 2.6.32-5-amd64 ...
	linux	/vmlinuz-2.6.32-5-amd64 root=/dev/mapper/fitz-root ro quiet acpi_enforce_resources=lax 
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.32-5-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.32-5-amd64 (recovery mode)" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
	echo	Loading Linux 2.6.32-5-amd64 ...
	linux	/vmlinuz-2.6.32-5-amd64 root=/dev/mapper/fitz-root ro single quiet acpi_enforce_resources=lax
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.32-5-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.32-3-amd64" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
	echo	Loading Linux 2.6.32-3-amd64 ...
	linux	/vmlinuz-2.6.32-3-amd64 root=/dev/mapper/fitz-root ro quiet acpi_enforce_resources=lax 
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.32-3-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.32-3-amd64 (recovery mode)" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
	echo	Loading Linux 2.6.32-3-amd64 ...
	linux	/vmlinuz-2.6.32-3-amd64 root=/dev/mapper/fitz-root ro single quiet acpi_enforce_resources=lax
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.32-3-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.31-1-amd64" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
	echo	Loading Linux 2.6.31-1-amd64 ...
	linux	/vmlinuz-2.6.31-1-amd64 root=/dev/mapper/fitz-root ro quiet acpi_enforce_resources=lax 
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.31-1-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.31-1-amd64 (recovery mode)" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set c43ffb58-075e-4b77-bee1-cd394c9abf02
	echo	Loading Linux 2.6.31-1-amd64 ...
	linux	/vmlinuz-2.6.31-1-amd64 root=/dev/mapper/fitz-root ro single quiet acpi_enforce_resources=lax
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.31-1-amd64
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/30_os-prober ###
### 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 testing
  APT policy: (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/1 CPU core)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages grub-pc depends on:
ii  debconf [debconf-2.0]         1.5.32     Debian configuration management sy
ii  grub-common                   1.98-1     GRand Unified Bootloader, version 
ii  libc6                         2.11.1-3   Embedded GNU C Library: Shared lib
ii  ucf                           3.0025     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

-- Configuration Files:
/etc/default/grub changed:
GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=""
GRUB_CMDLINE_LINUX="quiet acpi_enforce_resources=lax"
GRUB_GFXMODE=1600x1200


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





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