[linux-lvm] Grub/LVM boot problem

[John Koshi]

Hi,

I have a problem with the grub bootloader, as follows. I have a
laptop, with an 80G disk, with Windows XP on the first half of
the disk (NTFS), and Fedora core 4 (LVM) on the rest. Dual boot
is managed by grub, installed with the Fedora install.

I wish to clone this disk, so I don't lose hours of setup/installs
on both OS's, and my work, in case of a crash. I did the following:

1) Installed Acronis 10 under Windows, and cloned the entire disk
   to a 120G USB disk.
2) Restored from that clone onto a new 80G disk of the same geometry,
   and replaced the existing disk with the newly cloned one.
3) On start-up, got a grub hang, so did the following:
      a) Boot from Fedora core 4 rescue CD
      b) chroot /mnt/sysimage
      c) grub-install /dev/hda
      d) Enter grub
      e) grub> find /grub/stage1 -> gave me (hd0,3)
      f) grub> root (hd0,3)
      g) grub> kernel /vmlinuz-2.6.17-1.2142_FC4 ro root=/dev/hda4
      h) grub> initrd /initrd-2.6.17-1.2142_FC4.img -> gave me 
                    "Error 16: Inconsistent filesystem structure"
      i) Exit grub, repeat to step b) above, and rebuild initrd:
         "mkinitrd -v -f initrd-2.6.17-1.2142_FC4.img 2.6.17-1.2142_FC4
      j) Repeat from d) again, and get the same Error 16 as above.
4) Note that after step 3-c) above, I got past the grub hang, and was able
   to boot Windows. But selecting the Linux installation gave me "Error 17:
   Cannot mount selected partition". That's when I did the remaining steps
   above.

Sorry about the long-winded explanation, but this is frustrating, and I
wanted to provide all the details, in the hope that some-one could throw
some light on the dark innards of grub vis-a-vis LVM, to resolve this.

Thanks in advance.

regards,
John