Re: root seems to be incorrectly set after install

[Yoshinori K. Okuji]

On Sunday 03 February 2008 17:53, Yoshinori K. Okuji wrote:
> On Sunday 03 February 2008 16:18, Robert Millan wrote:
> > On Sun, Feb 03, 2008 at 09:47:17AM -0500, George Lengel wrote:
> > > Dear Robert,
> > >
> > > I now get a 0x80 at the top of the screen just before the rescue mode
> > > line. This indicates I am using my compiled version and also confirms
> > > your suspicion about the BIOS, right?
> > >
> > > >What version of GRUB Legacy did you install in that system?  Did you
> > > > modify GRUB Legacy when you installed it, or something like that?
> > >
> > > I use Grub legacy from Debian which is 0.97. It has worked for years
> > > and years without any problem and I never did anything past a simple
> > > apt-get and accept the defaults when configuring it.
> >
> > Can you check if you can override the root device by invoking grub-setup
> > manually with --root-device parameter?
>
> I have looked at this problem deeply, and I think the following changes
> would be required:
>
> - A variable to specify where grub.cfg and modules are present. Currently,
> we have it only for a prefix without a drive. So grub_root_drive or
> something must be added. It could be added to kern/i386/pc/startup.S, but
> boot/i386/pc/boot.S might be more appropriate (if there is space large
> enough).
>
> - grub-setup must handle a root drive independently, of a boot drive or an
> embedding drive.
>
> - kern/i386/pc/init.c must be modified accordingly.
>
> The scinarii would be the following:
>
> - If a core image is embedded, and a grub directory is in the same drive,
> all drives should be set to -1, thus a boot drive passed by BIOS or another
> boot loader will be used.
>
> - If a core image is embedded, and a grub directory is in a different
> drive, a root drive must be explicitly set by grub-setup. The other drives
> will be set by BIOS or another boot loader.
>
> - If a core image is not embedded, and it is in the same drive, the same as
> the first example.
>
> - If a core image is not embedded, and it is in a different drive, an
> embedding drive is identical to a root drive, and must be set explicitly by
> grub-setup.
>
> I am planning to fix it myself, but if I look too slow, please feel free to
> fix it instead of me.

I think I have fixed it. Please test it, if you can.

Okuji