The example below is provided only for assistance, in addition
to following the Operating System Administration manuals.
For SCO UNIX Version 4.0, 4.1 and 4.2 and DOS 4.01, 5.0, 6.0 and
6.1, the order in which UNIX and DOS are installed is insignificant
as long as the fdisk partition for DOS operating systems is set up
during the installation of the first one of the two operating systems.
The DOS partition must be the first partition on the hard disk.
Please note that this is not true for XENIX or earlier versions of
UNIX which can be installed only with DOS 3.3 and which require that
DOS be installed first. Also, the size of the DOS partition used to
be limited to 32 MB or less but that has changed for SCO UNIX Version
4.0. It is always recommended to start the UNIX system partition at
the beginning of the next cylinder of the hard disk.
Install SCO UNIX Operating System first. During UNIX installation,
when fdisk is invoked, set aside a large enough partition for DOS;
also leave an unused hard disk area where you will later install
Windows NT. (Windows NT requires 75 MB free hard disk space to
install.)
UNIX Partition Information:
Please note that beginning and end blocks will vary from
installation to installation.
Partition Status Type Start End Size
______________________________________________________
1 Inactive DOS 1 179 179
2 Active UNIX 3403 11849 8447
After completing the UNIX installation, test the system by booting
up. Then run fdisk and change the active partition from UNIX to DOS
before taking down the UNIX operating system with the command:
(The '#' sign indicates the command line prompt, do not type it in.)
# shutdown -y -g0
Install DOS at this point. Use the FAT file system type.
DOS partition information:
Partition Status Type Volume Label Mbytes System
___________________________________________________________
1 A PRI DOS 5 FAT12
2 non-DOS 235
After DOS is installed, install Windows NT on the unused hard disk
area that was set aside during UNIX installation. Boot up with
Windows NT boot diskette. Windows NT will detect UNIX and DOS
partitions and set up the Windows NT Bootmanager if DOS is found
on the system during Windows NT Operating System installation. For
file system type, choose FAT or Windows NT file system type.
After Windows NT installation has finished, test the system by
booting up. From the Boot Manager Menu, choose Windows NT. To
shut down the system, use the Windows NT menu 'system shutdown'
option. Boot up again using The Boot Manager, this time to DOS.
Run DOS fdisk and set UNIX as the active partition.
DOS partition information:
Partition Status Type Volume Label Mbytes System
___________________________________________________________
1 PRI DOS 5 FAT12
2 A non-DOS 235
3 EXT DOS 89
UNIX Partition Information:
Partition Status Type Start End Size
______________________________________________________
1 Inactive DOS 1 179 179
2 Active UNIX 3403 11849 8447
3 Inactive DOS (ext) 180 3374 3195
The three operating systems are now installed and working. At the
UNIX boot prompt 'boot:', press <Return> if you want to run UNIX.
Then type 'dos' and press <Return> for the Windows NT Boot Manager.
From the Windows NT Boot Manager Menu, choose Windows NT or DOS.
UNIX can't be added to Windows NT Boot Manager Menu as an option.
SEE ALSO:
For hardware and software incompatibility issues, see DOS README
files. Also refer to the SCO UNIX Operating System Installation
Guide and the Windows NT System Guide and MS DOS manuals for
installation.
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