Gene Heskett wrote:
On Monday 11 July 2005 11:24, Paul Howarth wrote:
Gene Heskett wrote:
This machine is a bit odd in that its actual boot partition isn't
even mounted by FC4. Somehow, in rigging it for dual booting of
FC4 and emc's bdi, its now booting from (hd1,0) instead of
(hd0,0), so that when a new kernel is installed as was the case
this morning, I have to hand modify the /dev/hdb1/grub/menu.lst
and copy all the new stuffs from /dev/hda1 to /dev/hdb1, which
when its booted to FC4, can be hand mounted as /mnt/bdi-boot.
/dev/hda1 is mounted by FC4 as /boot, but thats not where it boots
from.
I'd suggest adding an entry:
title Fedora Core 4
rootnoverify (hd0,1)
chainloader +1
to /dev/hdb1/grub/menu.lst
You should then be able to pick FC4 from the OS's boot menu, and
never have to fiddle with grub entries again.
Paul.
What would this do to the grub choice of boots menu? And shouldn't
that be (hd0,0) which is the 'other' /boot partition that FC4 would
normally use if somehow grub hadn't been pointed at hdb?
It will add a new entry.
ISTR that at some point in screwing around with the hardware in that
box, I swapped the master/slave jumpering of the drives, which may be
why its now booting from hdb. One drive is a 60GB and one is a 46GB.
And I don't recall theres an option to control the booting device in
the bios...
That would do it.
Here's how it works, from the BIOS point of view:
For each entry in the BOOT ENABLED DEVICE LIST do
case DEVICE TYPE of
CDROM: (I don't know what it does exactly)
FLOPPY: read the absolute first sector
check that the last two bytes are 0x55 0xAA
if they are then break out of loop, we
found the boot sector
HARDDISC:
read the absolute first sector
check that the last two bytes are 0x55 0xAA
if they are then break out of the loop, we
found the MBR.
end case
end for
if we broke out of the loop, then jump to the place we read
the bootstrap into
else
display an error message about being unable to boot
endif
What happens from here on out depends on what is installed
in the MBR or Boot Sector. I know what happens from here
on out for DOS machines, but not for others. Anyway, there
is supposed to be an entry in the PT which shows exactly
one partition marked as ACTIVE (some call it BOOT)
on hard discs.
Mike
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