topic Re: GRUB in Operating System - Linux

GRUB

Piotr Kirklewski — Tue, 09 Dec 2008 22:56:09 GMT

Hi there
I installed ESXi on additional drive in my server and now I'm struggling with GRUB configuration.
The drive on witch ESXi was installed is /dev/sdb and the /dev/sdb4 partition is described as "boot".

I was trying this:

title ESXi
rootnoverify (hd1,1)
chainloader +1

Unfortunately - no joy.

I'm getting: "Error 21 - selected disk doesn' exist"

Can you help ?

Regards

Peter

Re: GRUB

Steven E. Protter — Tue, 09 Dec 2008 23:45:38 GMT

Shalom Peter,

It may be a mis-detection of the disk by grub

http://www.linuxquestions.org/questions/linux-software-2/grub-bootloader-spits-out-grub-hard-disk-error-282421/

http://ubuntuforums.org/showthread.php?t=829005

One of these links should do it.

The key issue is figuring out what GRUB sees as far as disks go.

SEP

Re: GRUB

Ivan Ferreira — Wed, 10 Dec 2008 00:16:53 GMT

If it's the sencond disk, and the fourth partition, I woudl use rootnoverify (hd1,3)

Re: GRUB

Piotr Kirklewski — Wed, 10 Dec 2008 00:41:45 GMT

grub-install --recheck /dev/sdb

Probing devices to guess BIOS drives. This may take a long time.
Installation finished. No error reported.
This is the contents of the device map /boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

(fd0) /dev/fd0
(hd0) /dev/sda
(hd1) /dev/sdb

I was also trying (hd1,0),(hd1,1),(hd1,2),(hd1,3),(hd1,4)

No joy :(

Re: GRUB

Ragu_3 — Wed, 10 Dec 2008 06:45:17 GMT

For chain-loading an OS, the mbr of either of the disks should have a boot signature. Does either of your hard disks have this?

You should first embed the mbr with a boot signature, like this

grub> root (hd0,0)
grub> kernel (hd0,0)/boot/vmlinuz-XX root=/dev/sda1 ro
grub> setup (hd0)

or

grub> setup(hd1)

Hth.