View Full Version : [ubuntu] Problems booting from multiple disks with ASUS P5Q Deluxe Motherboard

May 5th, 2009, 12:45 PM
I have an ASUS P5Q Delux motherboard, with two Samsung 1TB disks set up as RAID 0 (fakeraid) and a Hitachi 1TB disk set up as a SATA drive.

My machine has Vista (64 bit) installed on the RAID. However, when I installed Ubuntu on the SATA drive I became unable to boot to window. The file browser in Ubuntu sees both the RAID and the Hitachi disk. Thankfully, I have been able to back up all my (Vista) files on the RAID onto a USB drive through Ubuntu. I am wanting to get the machine to dual boot into either Ubunto 9.04 (on the Hitachi drive) or Vista x64 on the RAID.

I can't get Grub to work. When I boot there is no grub menu - it just takes me straight into Ubuntu. If I do a df -k I get:

root@MMME1:/# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sdc1 949921868 2337256 899331380 1% /
tmpfs 1996572 0 1996572 0% /lib/init/rw
varrun 1996572 112 1996460 1% /var/run
varlock 1996572 0 1996572 0% /var/lock
udev 1996572 172 1996400 1% /dev
tmpfs 1996572 76 1996496 1% /dev/shm
lrm 1996572 2760 1993812 1% /lib/modules/2.6.28-11-generic/volatile
/dev/sda1 499896300 246161812 253734488 50% /media/Vista64

However, the file /boot/grub/device.map contains:
(hd0) /dev/sda

Grub doesn't seem to recognise sda, sdc, sda1 or sdc1.

If I do the command sudo grub device-map=test.map I get:
Probing devices to guess BIOS drives. This may take a long time.

[ Minimal BASH-like line editing is supported. For
the first word, TAB lists possible command
completions. Anywhere else TAB lists the possible
completions of a device/filename. ]

but it does not produce a test.map file.

If I try to get grub to list out its drives using the tab function it doesn't work either:
grub> root (hd
root (hd

Error 21: Selected disk does not exist

I have tried to install super grub by both USB pendrive and also a DVD, but neither will boot (I have changed the bios to make the USB/DVD bootable).

I would be grateful if anybody could help me - thanks.


May 5th, 2009, 09:37 PM
My motherboard is an ASUS P5Q3 Deluxe WiFI-AP. I put the wrong model in my previous post.