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How to boot Linux using floppy in dual boot scenario?

I would like to dual boot Redhat Linux 9 and XP but have Linux boot only from floppy so as not to have to modify the MBR.  What is the best procedure for this using Redhat 9 and XP?  I have XP installed now...

Thanks for any insight!
2 Solutions
If you do not want to change the Windows MBR, there is a way to have it boot Linux.

Run this from the command line with a floppy in the drive

  dd if=</> of=/bootsect.lnx bs=512 count=1

(</> represents the location of your root filesystem, probably /dev/hdb2). This creates a file of the first 512 bytes of your / and this is exactly what windows needs to boot linux.

Copy 'bootsect.lnx' to a floppy to transfer to Windows.

Boot into windows and get your bootsect.lnx file and put it wherever you want
Now you have to add a line to boot.ini. (do a search and open it.  After you modified it close with X and save)
   "C:\<bootsect.lnx's path>="RedHat Linux 9 (shrike)"

   [boot loader]
   [operating systems]
   multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect
   C:\bootsect.lnx="RedHat Linux 9 (Shrike)"
davisAuthor Commented:
Two quick questions:

1- If I were to follow the procedure above, would the Floppy be necessary to boot? (that is what I am looking for)

2- If I wanted to remove Linux, all that is needed is to remove the partitions and all is gone?  Anything else necessary?


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1.  Only when doing the disk dump (dd) of the /.  after that Windows should be able to load the file you create and copy to windows.  This will allow you to multi-boot windows and linux and not change the windows MBR.

2.  Yes.  and remove the Boot.ini entry.  Then that is it.
During the install of RH 9.0 you get the opportunity to make a boot floppy. This floppy enables you to boot without altering the MBR or any of the non Linux partitions - basically when you want to boot into linux, insert the floppy, when you don't, then don't. When asked whether you want to insert a boot loader anywhere just say no:)

By doing it this way, you don't even need to change the boot.ini file
To avoid removing the diskettte, you can use lilo (or grub- i do not use it) -
create lilofd.conf containing (e.g.):
boot=/dev/fd0  ## MUST


image=/vmlinuz #or /boot/vmlinuz

lilo  -v -v   -C   lilofd.conf

==Even Better==
If you :
fdformat  /dev/fd0h1440
mke2fs /dev/fd0
mount /dev/fd0   /mnt/fd0
cp /vmlinuz to /mnt/fd0
, you can add to the conf:


and have a semi-quasi rescue diskette.

BTW, I ALWAYS boot from floppy - great grief avoider

And, of course, get  toms:    http://www.toms.net/~toehser/rb/

davisAuthor Commented:
Thanks very much for the feedback!  
Her's is my QUESTION!

I installed redhat 9.0 a few months ago, but now I've lost the boot diskette.The default OS on my system is win XP which means I can't boot from linux during startup.  How do I edit boot.ini to see the 2 options to get access to linux again?
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