[xubuntu-users] OT? Problem booting Lenovo T61 with cloned hdd in select bay

[Hellmut Weber]

Hi list,
I'm using Xubuntu 10.10 on my Lenovo T61 Laptop.
The partition table of my system disk is:

    Gerät  boot.     Anfang        Ende     Blöcke   Id  System
/dev/sda1               1        3824    30716248+   7  HPFS/NTFS
/dev/sda2   *        3825        4334     4096575   83  Linux
/dev/sda3            4335        8158    30716280    7  HPFS/NTFS
/dev/sda4            8159       77825   559600147    5  Erweiterte
/dev/sda5            8159        9433    10241406   82  Linux Swap
/dev/sda6            9434       24731   122881153+  83  Linux
/dev/sda7           24732       77825   426477523+  83  Linux

/etc/fstab contains the lines:
/dev/sda6  /       ext4  errors=remount-ro 0 0
/dev/sda2  /boot   ext2  defaults          0 0
/dev/sda7  /home   ext4  defaults          0 0
/dev/sda5  none    swap  sw                0 0
(The NTFS partitions are used by Windows Systems (Native and with kvm)

The boot menu is defined in /boot/grub/grub.cfg and uses UUIDs to
identify the hdd partitions.

I used to make clone copies of my system disk (normally shown as
/dev/sda as above) with the program 'dd_rescue' which produces just a
physical copy of the source hdd.
The big advantage of this procedure is that in case of a problem I can
just put the clone disk into the machine and it will boot normally.

Obviously, this procedure requires to boot with the clone disk in the
select bay tray. It seemed to work perfectly with gentoo linux which I
used until half a year ago.

Some Time ago (unfortunately I don't remeber the exact moment or
circumstances) I noticed that booting with 2 identical disks as system
disk and in the select bay tray I have the following mount-situation:

...
/dev/sdb6 on / type ext4 (rw,errors=remount-ro,commit=0)
/dev/sda7 on /home type ext4 (rw,commit=0)
/dev/sda2 on /boot type ext2 (rw)
...

Working in this situation will produce an inconsistent state of my disks.


I tried so far:
   * change boot device order in setup/startup
   * overwrite the clone disk's UUIDs with randomly generated ones
   * change set root entry in /boot/grub/grub.cfg


Any idea is welcome


Cheers

Hellmut

-- 
Dr. Hellmut Weber         mail at hellmutweber.de
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