(no subject) [GRUB boot problems]

[Paolo]

Phil Schaffner said:
> On Tue, 2004-01-13 at 03:42, Paolo wrote:
>> Scott Talbot said:
>> > On Mon, 2004-01-12 at 13:07, Krikket wrote:
>> >> On Mon, 12 Jan 2004, Paolo wrote:
>> >
>> >>Snip<
>> >
>> >> > now the real issue,
>> >> > I installed fc1 but when I boot the machine I can only boot
>> windowsXp,
>> >> > there is no sign of grub ( I installed it the MBR)
>> >
>> > The only thing I can figure is that you either installed GRUB to the
>> MBR
>> > of the second hard drive, or to the boot sector of a partition or it
>> > wasn't actually installed anywhere.
>> >
>> > Assuming you booted into linux using a disk, get onto a terminal as
>> root
>> > and issue the command:  grub-install /dev/hda
>> >
>> > That should get you going.
>>
>> It doesn't work. I already tried it...
>>
>> Thanks.
>
> Have seen a number of cases where the BIOS disk mapping does not match
> what the running system sees.  This seem to happen particularly with
> RAID controllers and/or SCSI controllers mixed with IDE.  Try making a
> grub boot floppy on a working system and doing a "find /grub/stage1" (or
> "find /boot/grub/stage1" if you do not have a /boot partition) and find
> out what grub sees as (hdM) and (hdM,N) where M=[disk 0, 1, etc.] and
> N=[partition 0, 1, ...].  You should be able to boot the system from the
> floppy once you figure it out.

I'm sorry but I don't think I understand what you mean here.
I can boot the machine with the fedora cd,
linux rescue
and then
chroot /mnt/sysimage

So I can enter in the /grub partition and... ?
Do you want me to open the stage1 file ?

> You may find that the floppy boot sees different mappings than the
> installation saw, or that the running system will see if/when you get it
> to boot.  Use /boot/grub/device.map to get consistent results after you
> figure out the mapping.  When running grub from the command line when
> the system is up, use "grub --device-map=/boot/grub/device.map" and do
> finds similar to above to verify the mapping.  Once you have it right,
> you should be able to do something like:
> 	# grub --device-map=/boot/grub/device.map
> 	grub> root(hd0,1)
> 	grub> setup (hd0)
> 	grub> quit
>
> Good luck - this is a trial-and-error process in my experience on
> systems where the grub disk ordering changes between boot-time and
> running system.

Well,
thanks a lot for your answer!


-- 
                    Paolo C.