GRUB unknown error

[Tryfon]

One is an 80GB Western Digital ATA WDC WD800JB-00JJ and the other one a 40GB Seagate ATA ST340016A.

[labinnsw]

Another scenario I thought of is: the MBR is on one disk and the boot flag is on the other.

If that is the case he may need to re-install grub again, making sure that the correct disk is flagged.

[meierfra.]

Another scenario I thought of is: the MBR is on one disk and the boot flag is on the other.

According to RESULTS.txt the boot flag in on /dev/sda1 (just where it should be) The other drive is unformated and as no boot flag. Also the OP already tried to boot with the 40GB drive removed. So the second drive is not to blame.

[labinnsw]

I finally found the solution today when I got my Linux Format Magazine Issue 128.

After booting up with SuperGrub Disk, in a terminal run the following 2 commands

sudo update-grub
sudo grub-install /dev/sda

I also noticed that leppie had already posted a variation of this, so I am giving credit where credit is due.

[Tryfon]

labinsw, this was one of the first things I tried to do. It didn't work back then, it didn't work now either. Thanks for the effort anyway. Any other idea?

[labinnsw]

Boot into the ubuntu Live CD

In a terminal run the following commands

sudo mount /dev/sda1 /mnt
sudo mount --bind /dev /mnt/dev
sudo chroot /mnt
update-grub
grub-install /dev/sda

Reboot into your Ubuntu installation.

In a terminal run the following commands

update-grub
grub-install /dev/sda

When you reboot the second time it should be fixed.

[meierfra.]

I inserted an Ubuntu 9.10 disk and started the computer by selecting boot from first hard disk and it worked just fine.

This shows that grub is configured correctly. I have seen a couple cases like this before (with Legacy Grub and Grub 2), but Grub plainly refused to boot the system. So I suggest to give lilo a try:

http://members.iinet.net.au/~herman5...ackage_Manager