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Article #532

Re: why can't one boot from /dev/hdb?

#532
From: Dan Jacobson
Date: Tue, 05 Dec 2000 23:34
83 lines
4249 bytes
"Eric" <scare.crow@oz.land> ????? news:3A2CA3B5.E1F41875@oz.land...
> > Why can't one boot from /dev/hdb?  [grub, or lilo]
> > My bios  (01/22/98 Award Modular BIOS v4.51PG SiS-5598-<SP97_V>C-00)
> > gives my choices of boot drives "A: C: D: E: F:, cdrom, zip" etc. (meaning
fd0,
> > hda, hdb...)
>
> You can very well.
>
> Damnit Dan, you keep on posting, but I hardly ever see a reply from you
> telling us if it failed or worked.

err, sorry, I just thought I might reduce the noise pollution.  Thanks for
caring.
Mainly my discovories are [which might be hints for newbie helping docs]:
A boot disk has two types:
one that just contains the MBR
one that has more --- a rescue disk
one that has even more: a linux complete on a floppy... ok 3rd type.

also I never expected it to be true that one could just
edit menu.lst and not even run a command and it would affect things---true
in some cases.  This is diffrerent than lilo it seems. one still needs to run
lilo.
All these newbie things aren't really mentioned often.

A question I have is "installing lilo/grub on windows hda or hda1"
there are apparantly seveal degrees to such an installation.
one would be just writing to the MBR of hda.
another degree would entail more space on hda or hda1, but is there
such space waiting or will a windows thingy get ruined in the process.

I'm thinking the best thing would be if the boot  process would not invold both
hda hdb abd floppy.  i.e., revove the windows disk and still can boot linux,
remove linux disk and still boot windows----all with the minimal amount of
reconfiguration.

> (Appearantly it failed, but maybe you didn't try?)
>
> You have a different problem, and I mentioned this before.
> YOU HAVE A GEOMETRY PROBLEM!
>
> boot from this floppy, and enter "linux hdb=C,H,S", where CHS are the
> values used by the BIOS!
> Now make the lilo.conf file on hdb look like this:

erm, I still am analyzing the problem, I can boot from floppy now.
though I had to take out the 81-80-80-81 crossmap stuff to get into windows...
this is a clue to me as I mentioned in a more recient missive.  ok thanks.

> > boot=/dev/hda
> > map=/boot/map
> > install=/boot/boot.b
> > vga=normal
> > default=linux
> > keytable=/boot/us.klt
> > prompt
> > timeout=50
> > message=/boot/message
> >
> > image=/boot/vmlinuz
> >  label=linux
> >  root=/dev/hdb1
> >  initrd=/boot/initrd.img
> >  append=" hdc=ide-scsi"
> >  read-only
> >
> > other=/dev/hda1
> >  label=windows
> >  table=/dev/hda
>
> rerun /sbin/lilo and reboot.
> Now set your BIOS to boot from the first HDD
>
> Eric

indeed, i'm sure if I finally give in and overwrite MBR of hda, all will be
simple...
I just thought I could get away with overwriting MBR of hdb for the same
effect..
--
www.geocities.com/jidanni E-mail: restore ".com."  ???
Tel:+886-4-5854780; starting in year 2001: +886-4-25854780
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From: "Dan Jacobson" <jidanni@kimo.FiXcomTHiS.tw>
Newsgroups: alt.os.linux.mandrake,comp.os.linux.setup,gnu.utils.help
Subject: Re: why can't one boot from /dev/hdb?
Date: Wed, 6 Dec 2000 07:34:06 +0800
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