old-www/HOWTO/text/Multiboot-with-LILO

  Win95 + WinNT + Linux multiboot using LILO mini-HOWTO
  Renzo Zanelli, rzanelli@southeast.net
  v1.0, 26 March 1998

  This document describes how to use the to multiboot between Windows
  95, Windows NT, and Linux.
  ______________________________________________________________________

  Table of Contents


  1. Introduction

  2. Installing the Operating Systems

     2.1 Installing Windows 95
        2.1.1 Installing Windows NT 4.0
           2.1.1.1 Installing Linux

  3. The Linux part

  4. The Windows NT part

  5. The Windows 95 part

  6. References



  ______________________________________________________________________

  1.  Introduction

  There are a number of documents available that describe in detail how
  to multiboot just about any number of OS's using NT's OS loader.  When
  I finally bought Windows NT, I already had Windows 95 and Linux
  installed on my system and I was using LILO to multiboot between them.
  I decided to add Windows NT to LILO instead of using NT's OS loader.

  Originally I had Windows 95 on my first IDE disk drive and Linux on my
  second IDE disk drive.  The Linux drive became my third IDE drive and
  I installed a new IDE disk for Windows NT as my second drive.  Even
  though I haven't tried this in different configurations, I believe the
  order with which each OS is installed or which drive it is installed
  on is unimportant.

  Just remember to create those emergemcy bootup floppies when each OS
  prompts you to!

  Because I used Gilles Vollant's BootPart utility and BootPart only
  supports drives up to 4GB in size, this may not work if you have
  drives of larger capacity.  If you need to work with drives greater
  than 4GB, contact Gilles directly (see BootPart documentation for
  Gilles' e-mail address).



  2.  Installing the Operating Systems

  When you install the OSes, make sure that all are installed on
  bootable partitions.  I installed both Windows 95 and Windows NT on
  Fat 16 partitions, so this procedure works on Fat 16 drives.  If you
  decide to use Fat32 for Windows 95 and NTFS for Windows NT, check to
  see if your version of Linux supports them and, if so, to what extent.


  2.1.  Installing Windows 95

  Install Windows 95 on your first drive.  This will be your C: drive.
  Remember to create the Windows 95 boot floppies when prompted to do
  so.

  I have found that it is better if the Linux drive is removed from the
  system when installing Windows 95, so that it is never detected and it
  doesn't exist as far as Windows 95 is concerned.

  At this point, if you did everything correctly, you should be able to
  boot Windows 95.



  2.1.1.  Installing Windows NT 4.0

  Install Windows NT 4.0 on your second drive.  When you create the
  partition on this drive, make the partition bootable.  Not all
  versions of Linux support NTFS, so I created a FAT16 partition, just
  to be on the safe side and because I wanted to exchange data between
  the Windows drives.

  When Windows NT installs, it will detect the presence of Windows 95
  and will create an entry for it in the NT OS loader and you should see
  three entries in the OS loader menu as follows:


       Windows NT Workstation Version 4.00
       Windows NT Workstation Version 4.00 [VGA mode]
       Microsoft Windows



  At this point, if you did everything correctly, you should be able to
  multiboot to Windows NT and Windows 95.



  2.1.1.1.  Installing Linux

  Install Linux on your third drive.  When I installed Linux, I only had
  Windows 95 installed so I only added the Windows 95 partition to Lilo.
  You can go ahead and install all OSes while installing LILO, or edit
  the Lilo configuration file later.  However you decide to do it, I
  will show you how the /etc/lilo.conf file is supposed to look in the
  next section.  Once Linux is installed, you should be able to boot to
  Linux.



  3.  The Linux part

  This will involve editing the /etc/lilo.conf file and reinstalling
  LILO.  The following should already be present in /etc/lilo.conf:


       boot=/dev/hda



  The Linux stanza should also be already present:


  # Linux stanza
  image=/vmlinuz
  root=/dev/hdc1
  label=Linux
  # End Linux stanza



  Now add the Windows 95 stanza:


       # Windows 95 stanza
       other=/dev/hda1
       table=/dev/hda
       label=Windows95
       # End Windows 95 stanza



  Now add the Windows NT stanza:


       # Windows 95 stanza
       other=/dev/hdb1
       table=/dev/hda
       loader=/boot/any_d.b
       label=WindowsNT
       # End Windows 95 stanza



  Now run LILO again.  At this point, if all is well, you should have
  Windows 95, Windows NT, and Linux as selections from LILO.  You should
  be able to boot to Linux and Windows 95 (which should give you the
  Windows NT OS loader).  To make the Windows NT entry operational, you
  still need to do some work on the Windows NT side.



  4.  The Windows NT part

  Before you can continue, you need two do two things.

  The first is to download and unzip Gilles Vollant's BootPart utility
  which can be found at  <http://www.winimage.com/bootpart.htm> with
  some information on how to use it.

  The second thing to do is copy (do not delete them yet!) the following
  files to the root of the Windows NT drive:


       Boot.ini
       Bootsect.dos
       Ntdetect.com
       Ntldr



  These files are the Windows NT loader.  They are located in the root
  of the Windows 95 drive and were placed there by Windows NT when you
  installed it.

  Once this is done, boot to the Windows 95 DOS prompt (press Shift+F5
  when Windows 95 loads) and issue the following command:


       BOOTPART WINNT BOOT:D:



  Now you must edit Boot.ini in your Windows NT root directory.  You
  must edit three lines, one in the [boot loader] section and two in the
  [operating systems] section.

  This is the original Boot.ini:


       [boot loader]
       timeout=30
       default=multi(0)disk(0)rdisk(1)partition(1)\WINNT
       [operating systems]
       multi(0)disk(0)rdisk(1)partition(1)\WINNT="Windows NT Workstation Version 4.00"
       multi(0)disk(0)rdisk(1)partition(1)\WINNT="Windows NT Workstation Version 4.00 [VGA mode]" /basevideo /sos
       C:\ = "Microsoft Windows"



  This is the new Boot.ini:


       [boot loader]
       timeout=30
       default=multi(0)disk(0)rdisk(0)partition(1)\WINNT
       [operating systems]
       multi(0)disk(0)rdisk(0)partition(1)\WINNT="Windows NT Workstation Version 4.00"
       multi(0)disk(0)rdisk(0)partition(1)\WINNT="Windows NT Workstation Version 4.00 [VGA mode]" /basevideo /sos



  Notice that all instances of rdisk(1) have been changed to rdisk(0)
  and the line referencing Windows 95 has been removed.

  After saving Boot.ini, if you did everything correctly, you should now
  be able to boot to Windows NT from LILO.



  5.  The Windows 95 part

  Create a bootable DOS floppy from the Windows 95 DOS prompt (press
  Shift+F5 when Windows 95 loads).  It is important that this floppy be
  created at the DOS prompt, not from a DOS window inside Windows95!  Do
  not boot to Windows95 until this step is complete!  Copy the file
  C:\WINDOWS95\COMMAND\SYS.COM to the floppy (substitute your Windows95
  path if different).  Now boot from the floppy and enter the command:


       SYS C:



  This should have removed the Windows NT OS loader and you should be
  able to boot directly into Windows 95 from LILO.

  You can now remove the NT loader files:


       Boot.ini
       Bootsect.dos
       Ntdetect.com
       Ntldr



  6.  References

  Thanks to the following people (in no particular order):

  James C. Bevier & D. Michael McFarland.  In a message exchange on the
  reddhat-list they provided some information on how to boot NT from
  Linux.

  Gilles Vollant.  BootPart is a very useful utility and Gilles makes it
  available for free with some nice documentation.  Thanks Gilles.

  Mike Harlan.  By reading his 'Linux-DOS-Win95-OS2' mini-HOWTO, it
  helped me make some assumptions about LILO's behavior.