Oops! How could I forget about the partition table?! mea culpa. Let's
hope Daniel hasn't done this and trashed it ..
Daniel, I ALWAYS save a copy of the boot sector on a floppy before
mucking around like this. You should, too.
Sometimes dd is the only thing that works. My home machine uses
the Win2K bootloader to load either Win2K, RH7.1 or Win98. I
did it by "installing" each one, carefully stripping the MBR using
dd and copying it (as a file) to my Win2K drive. I then restored
my Win2K MBR (so that win2k would boot) and edited boot.ini in
the usual way.
J.
Yedidyah Bar-David wrote:
>
> Hi
>
> I havn't read the entire message, but I quickly reply:
> Do not do 'dd if=/dev/fd0 of=/hdc bs=512 count=1' unless you know
> _very_well_ what you are doing. You will erase your partition
> table.
>
> On Wed, Oct 17, 2001 at 10:57:55AM +0200, Jeremy Hoyland wrote:
> > Daniel,
> > IIRC I have managed to boot without problems from /dev/hdb, /dev/hdc
> > etc.
> > Unless someone introduced a new limitation into lilo! Anyway, here are a
> > few
> > ideas.
> >
> > 1. The primary "slot"? I think you mean first IDE slot, no? In that
> > case,
> > you want to wire your disk as primary for the second IDE slot. This is
> > called /dev/hdc. I have booted REALLY old PCs from /dev/hdc with lilo.
> > Make sure your BIOS can boot from the second slot (may require tweaking
> > in the BIOS setup screens).
> > boot=/dev/hdc
> >
> > NB, to change fstab to reflect this, boot from a CD, mount the root
> > partition and edit fstab.
> >
> > 2. The bios=0x80 trick is VERY chicken and egg. Try above first.
> >
> > 3. If you (eventually) fall back on a floppy boot, an interesting idea
> > (that works) is to write the boot sector to a partition and not to the
> > MBR. use boot=/dev/hdc5. Now, strip this boot sector directly onto a
> > floppy, like this:
> > dd if=/dev/hdc5 of=/dev/fd0 bs=512 count=1
> > Now, the ONLY thing that is read from the floppy is the boot sector.
> > Everything else comes from the hard disk, so there's almost no speed
> > penalty for booting from the floppy :-)
> >
> > You can use this trick to try lots of different lilo configurations
> > without affecting your hard disk. Once you get it to work, strip the
> > boot sector back to the MBR with
> > dd if=/dev/fd0 of=/dev/hdc bs=512 count=1
WARNING! WARNING! THIS WILL WIPE YOUR PARTITION TABLE!
> >
> > You can even put boot=/dev/fd0 if you just want to experiment ..
> >
> > 4. Don't forget the 1024 cylinder limitation! Old BIOSes won't boot
> > beyond this even if you do have the latest lilo. Make a tiny /boot
> > partition that lies completely within 1024 cylinders, and boot from
> > there.
> >
> > 5. Partition Magic 5.0 CAN partition 30 GB. Tried and Tested by yours
> > truly. If you have a problem it may be BIOS related - try partitioning
> > the disk on a different machine, and return it to your target machine
> > when your finished.
> >
> >
> >
> > > Date: Tue, 16 Oct 2001 20:54:07 +0200
> > > From: Daniel Feiglin <[EMAIL PROTECTED]>
> > > Subject: Two system problems
> > >
> > > Hi folks!
> > <snip>
> > > 2. One of the "junk" systems I put together, has a P166 + 32Mb and a "dafuk" IDE
> > > primary slot (The machine originally had Win 95 on a 2Gb drive which booted OK
> > > from the the second IDE slot.) With Linux, I can only boot off a floppy, since
> > > lilo won't allow an IDE hard disk boot from anthing other than
> > > /dev/hda<something>. Upon examining the lilo.conf man page I found all sorts of
> > > interesting tricks for remapping the IDE drive ID's: e.g.
> > > disk=/dev/hdc bios=0x80
> > > or
> > > map-drive=0x82 to=0x80
> > >
> > > My root device is /dev/hdc5, and I boot from on /dev/fd0. I would like to use
> > > the above disk= ... mapping. I modified lilo.conf to root, /dev/hda5, boot from
> > > /dev/hda2 and put the boot sector on /dev/hda MBR. I also modified fstab to
> > > reflect the new arrangement. Of coure lilo failed, because the new arrangements
> > > are meaningless until I reboot, which I cannot do! What to do?
> > >
> > > Thanks to the people who supplied the "junk". I'm still looking for Pentium
> > > stuff, MB with slot 7 or better.
> > >
> > > Regards,
> > >
> > >
> > > Dan Feiglin
> > >
> > >
> >
> > --
> > ---------------------------------------------------------------------
> > ______
> > /_____/\
> > /____ \\ \ Jeremy Hoyland, System Architect
> > /_____\ \\ / Sun Israel Development Center
> > /_____/ \/ / / Sun Microsystems Israel, Ltd.
> > /_____/ / \//\ HaMenofim 9 ,POB 12610
> > \_____\//\ / / Herzliya, ISRAEL 46733
> > \_____/ / /\ /
> > \_____/ \\ \ Tel: +972 9 971-1288
> > \_____\ \\ Fax: +972 9 971-1222
> > \_____\/
> >
> > =================================================================
> > To unsubscribe, send mail to [EMAIL PROTECTED] with
> > the word "unsubscribe" in the message body, e.g., run the command
> > echo unsubscribe | mail [EMAIL PROTECTED]
>
> Didi
--
---------------------------------------------------------------------
______
/_____/\
/____ \\ \ Jeremy Hoyland, System Architect
/_____\ \\ / Sun Israel Development Center
/_____/ \/ / / Sun Microsystems Israel, Ltd.
/_____/ / \//\ HaMenofim 9 ,POB 12610
\_____\//\ / / Herzliya, ISRAEL 46733
\_____/ / /\ /
\_____/ \\ \ Tel: +972 9 971-1288
\_____\ \\ Fax: +972 9 971-1222
\_____\/
=================================================================
To unsubscribe, send mail to [EMAIL PROTECTED] with
the word "unsubscribe" in the message body, e.g., run the command
echo unsubscribe | mail [EMAIL PROTECTED]
