Jerry Geis wrote:
> On Cent OS 4 the very last screen says REBOOT. Before
> click that do CTRL-ALT_F2 and get a prompt.
> then enter the following commands.
>
> This will allow the software raid arrays to boot.
>
> grub
> find /boot/grub/stage1
> device (hd0) /dev/hda
> root (hd0,0)
> setup (hd0)
>
> This is easier the setting up mdXXX commands after boot.
The above would install Grub only on first disk. If it fails, you would
be unable to boot since there's no boot loader on the second drive. To
correctly set it up, it is a bit more complicated than above. There's
several ways to do it, all of them equally correct. Following your path
above, he'd need to repeat the last three steps for second disk too.
Assuming first disk is /dev/hda, and second disk is /dev/hdc, and
assuming partition containing /boot is first partition on each disk
((hd0,0) and (hd1,0) parameters):
# grub
grub> find /boot/grub/stage1
(hd0,0)
(hd1,0)
or "find /grub/stage1", depending on partitioning configuration.
grub> device (hd0) /dev/hda
grub> root (hd0,0)
grub> setup (hd0)
grub> device (hd0) /dev/hdc
grub> root (hd0,0)
grub> setup (hd0)
A bit more complicated alternative is using "install" command directly,
and removing "root" line from grub.conf. Grub can usually guess what
should be root correctly. Something along the lines (assuming /boot is
separate partition, if not prepend "/boot" to all paths that don't have it):
install --stage2=/boot/grub/stage2 (hd0,0)/grub/stage1 (hd0) \
(hd0,0)/grub/stage2 p (hd0,0)/grub/grub.conf
install --stage2=/boot/grub/stage2 (hd1,0)/grub/stage1 (hd1) \
(hd1,0)/grub/stage2 p (hd1,0)/grub/grub.conf
The above commands are split into two lines for readability. When
typing them, remove "\" and type each of them as single line. Don't
forget to remove "root" line from /boot/grub/grub.conf if using second
approach.
--
Aleksandar Milivojevic <amilivojevic@xxxxxx> Pollard Banknote Limited
Systems Administrator 1499 Buffalo Place
Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7
