Boot problems (still)
Aaron Konstam
akonstam at sbcglobal.net
Wed Feb 7 16:16:27 UTC 2007
On Tue, 2007-02-06 at 22:59 -0500, Jim Cornette wrote:
> zephod at cfl.rr.com wrote:
> > I reported this problem some time ago but I still cannot boot my FC6
> > disk. I have been poking around the GRUB source and I now have a
> > better understanding of what GRUB does but I don't understand this
> > problem.
> >
> > I have 2 disks, one is a SATA disk that has Windows XP on it. The
> > other disk is an IDE that has my FC6 on it. When I try to boot to the
> > FC6 disk, the machine just reboots over and over again. I then boot
> > from the rescue disk and look at the partitions using fdisk.
> > Everything looks normal. The Windows stuff is on /dev/sda and the FC6
> > stuff is on /dev/hdk. /boot/grub/device.map contains:
> >
> > (hd0) /dev/sda
> > (hd1) /dev/hdk
> >
> > If I enter GRUB in interactive mode and do
> >
> > # geometry (hd0,0)
> >
> > I get the output I expect but when I do
> >
> > # geometry (hd1,0)
> >
> > GRUB tells me that there is no such disk. The reason GRUB won't boot
> > is that is fails the root (hd1,0) command in the grub.conf file.
> >
> > I even re-installed GRUB
> >
> > # grub-install /dev/hdk
> >
> > with no problems but when I go back inro GRUB it still tells me there
> > is no hd1.
> >
> > Can anyone give me somewhere else to look for clues? If GRUB looks at
> > device.map to figure that hd1 means /dev/hdk and grub-install is OK
> > installing on /dev/hdk, why doesn't GRUB recognize the 2nd disk?
> >
> > Steve
> >
>
> The problem with rebooting without a rational cause happened to me
> booting from a xen kernel. Are you booting from a xen enabled kernel?
> Chances are that this is not your problem but just in case it is your
> problem.
>
> Regarding the no such disk problem. I had problems on two different Dell
> computers which the secondary drive was disabled in BIOS. Fedora itself
> recognized the disks but grub did not because of the BIOS setting. Are
> your BIOS settings set to show all disks?
>
> Regarding Grub interactive. I had to use it myself today for the first
> time. It is highly cryptic but not too hard once you get through the
> vague documentation.
>
> CAUTION: (I don't know what the heck I'm doing in the grub shell yet
> this is a question only)
> What would happen if you entered
> root (hd1,0)
> followed by
> setup (hd0)
>
> Basically, boot is the first partition on the second hard drive and grub
> is booted from MBR.
>
> I had to do this on a computer which I moved boot from sdb2 to sdb1
> changed fstab reference and /boot/grub/grub.conf references but did not
> run grub-install before rebooting.
>
> Why are you trying geoometry
> --
The above grub coammands shold work, and the boot block should be placed
on /dev/sda.
=======================================================================
Everyone wants results, but no one is willing to do what it takes to get
them. -- Dirty Harry
=======================================================================
Aaron Konstam telephone: (210) 656-0355 e-mail: akonstam at sbcglobal.net
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