bug report

[Faheem Mitha]

This is part of an attempt to install grub2 to the software raid array 
from inside a chroot.

I was trying to mount the boot partition on the chrooted root partition, 
both on them logical volumes on a software raid device. grub seems to be 
having problems with the boot device though. The vg in question 
corresponds to newdebian below.

I don't know if this is a real bug, or really what the relevant info is to 
include, so I'm just dumping some info here.

grml:/# dpkg -l grub-pc
Desired=Unknown/Install/Remove/Purge/Hold
| 
Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                         Version                      Description
+++-============================-============================-========================================================================
ii  grub-pc                      1.98+20100804-10             GRand Unified 
Bootloader, version 2 (PC/BIOS version)

grml:/# grub-install /dev/md0
/usr/sbin/grub-probe: error: no such disk.
Auto-detection of a filesystem of /dev/mapper/newdebian-boot failed.
Please report this together with the output of "/usr/sbin/grub-probe 
--device-map=/boot/grub/device.map --target=fs -v /boot/grub" to 
<address@hidden>

Similar results with

grml:/# grub-install /dev/sda
/usr/sbin/grub-probe: error: no such disk.
Auto-detection of a filesystem of /dev/mapper/newdebian-boot failed.
Please report this together with the output of "/usr/sbin/grub-probe 
--device-map=/boot/grub/device.map --target=fs -v /boot/grub" to 
<address@hidden>

grml:/# /usr/sbin/grub-probe --device-map=/boot/grub/device.map 
--target=fs -v /boot/grub
/usr/sbin/grub-probe: info: Cannot stat 
`/dev/disk/by-id/scsi-1AMCC_3QF0QNYWC318ED001709', skipping.
/usr/sbin/grub-probe: info: Cannot stat 
`/dev/disk/by-id/scsi-1AMCC_3QF0SGE4C318ED000F4B', skipping.
/usr/sbin/grub-probe: info: changing current directory to /dev.
/usr/sbin/grub-probe: info: changing current directory to newdebian.
/usr/sbin/grub-probe: info: changing current directory to md.
/usr/sbin/grub-probe: info: changing current directory to backup.
/usr/sbin/grub-probe: info: changing current directory to debian.
/usr/sbin/grub-probe: info: changing current directory to dri.
/usr/sbin/grub-probe: info: changing current directory to snd.
/usr/sbin/grub-probe: info: changing current directory to by-path.
/usr/sbin/grub-probe: info: changing current directory to cpu.
/usr/sbin/grub-probe: info: changing current directory to shm.
/usr/sbin/grub-probe: info: changing current directory to bus.
/usr/sbin/grub-probe: info: changing current directory to usb.
/usr/sbin/grub-probe: info: changing current directory to 002.
/usr/sbin/grub-probe: info: changing current directory to 001.
/usr/sbin/grub-probe: info: changing current directory to disk.
/usr/sbin/grub-probe: info: changing current directory to by-label.
/usr/sbin/grub-probe: info: changing current directory to by-uuid.
/usr/sbin/grub-probe: info: changing current directory to by-path.
/usr/sbin/grub-probe: info: changing current directory to by-id.
/usr/sbin/grub-probe: info: changing current directory to block.
/usr/sbin/grub-probe: info: changing current directory to char.
/usr/sbin/grub-probe: info: changing current directory to net.
/usr/sbin/grub-probe: info: changing current directory to pts.
/usr/sbin/grub-probe: info: changing current directory to bsg.
/usr/sbin/grub-probe: info: changing current directory to mapper.
/usr/sbin/grub-probe: info: opening newdebian-boot.
/usr/sbin/grub-probe: error: no such disk.

grml:/# fdisk -l (only for sda, where the degraded device lives)

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 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: 0x00071bf8

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1       24315   195310206   8e  Linux LVM
/dev/sda2   *       24316       38905   117187584   fd  Linux raid 
autodetect

Disk /dev/md0: 120.0 GB, 119997915136 bytes
2 heads, 4 sectors/track, 29296366 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/md0 doesn't contain a valid partition table

Disk /dev/dm-14: 55.0 GB, 54999908352 bytes
255 heads, 63 sectors/track, 6686 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: 0x00000000

Disk /dev/dm-14 doesn't contain a valid partition table

Disk /dev/dm-15: 28.0 GB, 27996979200 bytes
255 heads, 63 sectors/track, 3403 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: 0x00000000

Disk /dev/dm-15 doesn't contain a valid partition table

Disk /dev/dm-16: 251 MB, 251658240 bytes
255 heads, 63 sectors/track, 30 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: 0x00000000

Disk /dev/dm-16 doesn't contain a valid partition table

grml:/# lvs
  LV            VG        Attr   LSize   Origin Snap%  Move Log Copy% 
Convert
  local_src     backup    -wi-a-  25.00g
  video         backup    -wi-a-  65.00g
  etch_template debian    -wi-a-  10.00g
  fedora        debian    -wi-a-  10.00g
  feisty        debian    -wi-a-  10.00g
  gutsy         debian    -wi-a-   5.00g
  home          debian    -wi-a-  50.00g
  lenny         debian    -wi-a-  10.00g
  msi           debian    -wi-a-  10.00g
  oldchresto    debian    -wi-a-   5.00g
  root          debian    -wi-a-  25.00g
  suse          debian    -wi-a-  10.00g
  vgentoo       debian    -wi-a-  10.00g
  wsgi          debian    -wi-a-  10.00g
  boot          newdebian -wi-ao 240.00m
  home          newdebian -wi-a-  51.22g
  root          newdebian -wi-ao  26.07g

grml:/# vgs
  VG        #PV #LV #SN Attr   VSize   VFree
  backup      1   2   0 wz--n- 186.26g 96.26g
  debian      1  12   0 wz--n- 186.26g 21.26g
  newdebian   1   3   0 wz--n- 111.75g 34.22g

# /etc/fstab: static file system information.
#
# Use 'vol_id --uuid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    defaults        0       0
/dev/mapper/newdebian-root /               ext3    errors=remount-ro 0 
1
/dev/mapper/newdebian-boot /boot           ext3    defaults        0 
2
/dev/mapper/newdebian-home /home           ext3    defaults        0 
2
# swap was on /dev/sdb2 during installation
UUID=948b8576-0085-44f2-858b-440713248d71 none            swap    sw 
0       0
/dev/scd0       /media/cdrom0   udf,iso9660 user,noauto     0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto  0       0
/dev/sdc1       /media/usb0     auto    rw,user,noauto  0       0

Regards, Faheem