Re: GRUB problem with multiple ATA controllers

[adrian15]

Gerry Reno escribió:
> cat /boot/grub/device.map:
>
> # this device map was generated by anaconda
> (hd3)     /dev/hdi
> (hd2)     /dev/hdk
>
>     GNU GRUB  version 0.97  (640K lower / 3072K upper memory)
>
>  [ 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.]
>
> grub> root (hd0,0)
>  Filesystem type unknown, partition type 0xfd
>
> grub> root (hd1,0)
>  Filesystem type unknown, partition type 0xfd
>
> grub> root (hd2,0)
>  Filesystem type is fat, partition type 0xe
>
> grub> root (hd3,0)
>
> Error 21: Selected disk does not exist
>
> grub> quit
>
> As you can see, the first partition on each drive is of type 0xfd which
> is Linux Software Raid type. But, for some reason GRUB cannot see the
> fourth drive at all and misidentifies the third drive first partition as
> fat. So I'm suspecting I've stumbled across a bug in GRUB which is
> preventing this system from booting. Has anyone run across this before?
>
> ATA controllers:
>  onboard HPT372
>  PCI card HPT302
> OS: Fedora Core 6
> GRUB: grub-0.97-13

I must admit it is the first time I see such a strange configuration.
You try to boot from hd3!

1st thing
===========

As long as grub invents itself the hd0 drive I recommend you running
grub like this and see if it invents hd0 or not again:

grub --device-map=/boot/grub/device.map

2nd thing
===========
I do not know which kind of bios you have but usually the hard disk that
it is booted is labeled by the bios as: hd0 so if you pretend to boot
from /dev/hdi you should perhaps modify your device.map so that you see
something as:

(hd0)     /dev/hdi
(hd1)     /dev/hdk

and then re-install grub, or alternative use the device command inside
grub shell.

If you can tell your bios to boot your hdi drive as hd3 you have a quite
good bios :).

3rd thing
=============
You can use Super Grub Disk ( http://supergrub.forjamari.linex.org )
cdrom, burn it, boot from it and then:

Option Boot & Tools -> Boot Partition to see what hard drives does grub
see and to which actual hard disks are there mapped from the bios point
of view.


adrian15