Bug#566735: grub-pc: Unable to boot from LVM, "error: no such disk".

[David L. Anselmi]

Package: grub-pc
Version: 1.98+20100804-4
Severity: normal

I've retested and this bug still exists so I'll reopen.  Here's the new
behavior.  On boot it says:

error: no such disk
Entering rescue mode
grub rescue>

(i.e., only one error line rather than two).  lsmod shows:

Name    Ref Count   Dependencies
lvm     1
part_msdos  1
ext2    1           fshelp
fshelp  2
biosdisk    1
minicmd 1

and ls:

(hd0) (hd0,msdos2) (hd0,msdos1) (fd0)

So I think I have a correct config and the right modules, but something doesn't
work.

>From the grub prompt is there anything else I can do to troubleshoot?  root
seems not to be usable, even if I set it to vg0-root.

I don't think there is anything unusual about this disk.  The first partition is
NTFS, the second is LVM.  I have a 32 bit box with a single LVM partition and
grub2 works fine.  I have a 64 bit box with more complicated partitions and
grub2 works fine.

I suppose the LVM partition might be pretty old--could it be not quite right for
grub2?  I don't get any errors when looking at the pvs/vgs/lvs.

How else can I help?

Thanks!
Dave

-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/mapper/vg0-root / ext3 rw,relatime,errors=remount-ro,data=ordered 0 0
/dev/mapper/vg0-home /home ext3 rw,relatime,errors=continue,data=ordered 0 0
/dev/mapper/vg0-tmp /tmp ext3 rw,relatime,errors=continue,data=ordered 0 0
/dev/mapper/vg0-usr /usr ext3 rw,relatime,errors=continue,data=ordered 0 0
/dev/mapper/vg0-var /var ext3 rw,relatime,errors=continue,data=ordered 0 0
/dev/mapper/vg0-audio /srv/audio ext3 rw,relatime,errors=continue,data=ordered 0 0
/dev/mapper/vg0-debian /srv/debian ext3 rw,relatime,errors=continue,data=ordered 0 0
*********************** END /proc/mounts

*********************** BEGIN /boot/grub/device.map
(hd0)	/dev/disk/by-id/ata-SAMSUNG_SP1614N_S016J10Y429365
*********************** END /boot/grub/device.map


-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.32-5-686 (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash

Versions of packages grub-pc depends on:
ii  debconf [debconf-2.0]    1.5.32          Debian configuration management sy
ii  grub-common              1.98+20100804-4 GRand Unified Bootloader, version 
ii  libc6                    2.10.2-9        Embedded GNU C Library: Shared lib
ii  libdevmapper1.02.1       2:1.02.45-1     The Linux Kernel Device Mapper use
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

-- debconf information:
  grub2/kfreebsd_cmdline:
* grub2/device_map_regenerated:
* grub2/linux_cmdline:
  grub-pc/install_devices_empty: false
  grub-pc/install_devices_failed: false
  grub-pc/chainload_from_menu.lst: true
  grub-pc/kopt_extracted: false
* grub-pc/install_devices: /dev/disk/by-id/ata-SAMSUNG_SP1614N_S016J10Y429365
  grub-pc/postrm_purge_boot_grub: false
  grub-pc/install_devices_failed_upgrade: true
  grub-pc/disk_description:
  grub2/kfreebsd_cmdline_default: quiet
  grub-pc/partition_description:
  grub-pc/install_devices_disks_changed:
* grub2/linux_cmdline_default: quiet
  grub-pc/mixed_legacy_and_grub2: true