[CLUE-Tech] Stump the stiffs III: Wrecked MBRs (grub)

[David Anselmi]

Lynn Danielson wrote:
> Just another note about lilo.  Every time it writes a boot sector
> it copies the prewrite version of that sector, typically to a file
> called /boot/boot.0300.  This file can be used to restore the
> previous boot sector using lilo with the -u switch, kind of like
> running fdisk /mbr in DOS.

The boot.0300 file gets written only if it doesn't already exist.  So 
the first time you install lilo, your old (DOS, maybe?) boot sector gets 
saved.  Then you can use lilo -u to uninstall.

If you make many changes to lilo.conf while you're testing something, 
you could move this file each time.  But it seems easier to just do your 
testing using a floppy mbr.  Or put your good mbr on a floppy and test 
on your hard drive.  Then you just swap boot devices if your test 
doesn't work.

Dave