I am not giving the instructions for installing either operating system, please refer to the appropriate documentation.

The following procedure seems to work properly. I found that if you try to install Windows 95 Revision C first, the FAT32 file system causes many problems when you try to install OS/2 Warp 4. Large hard drives (>2 gigabytes (GB)) can also cause problems because the original OS/2 drivers were not designed for drives of this size and have since been upgraded (the latest version --July 14, 1998-- will see up to 8.4 GB), see notes (a) and (c) below.

1. Install either Boot Manager from Partition Magic or OS/2 FDISK .

2. Partition the hard drive with two C: partitions (one hidden) using OS/2 FDISK or Partition Magic. You may also create several logical partitions at this time to store your data. Both of these two partitions MUST be in the first 2 gigabytes of the hard drive if the operating system is to be useful.

3. Add the two C: partitions to the Boot Manager using either FDISK or Partition Magic

4. Set the OS/2 partition to active using Partition Magic.

   OR

   If using OS/2 FDISK as part of the install process, this will be accomplished as part of the process.

5. Install OS/2 using HPFS file system. (Note: To do so, select the "Advanced" install option.) Using the HPFS (High Performance File System) will make more effective use of large partitions without wasting the space that the FAT (File Allocation Table) system will lose due to the ineffective use of clusters because of the large cluster size created in the FAT system.

6. Once OS/2 is installed and functional, set the hidden Windows 95 partition to "active" using Partition Magic.

7. Install Windows 95 to this partition. Note that when installing Windows 95, there will be several warnings about OS/2 files and Boot Manager. Ignore these warnings as the only partition that Windows 95 can see is the one you set active and it will not affect the OS/2 files already installed.

8. Once Windows 95 is installed and all elements are set up, install Partition Magic under Windows 95.

9. Use Partition Magic to set Boot Manager as active. Also in Partition Magic under the Boot Manager menu item use the Set as Default Menu Item to set the C: partition and operating system that you wish to use most frequently. You may also wish to set the preferences as to the length of delay before going to the default operating system.

10. When you reboot the computer, Boot Manager should offer you the choice of OS/2 Warp 4 or Windows 95. By making your selection, you should enter into that operating system.

Notes:

1. If you are using a large hard drive (> 2GB)), use the new drivers available from IBM in the file IDEDASD.EXE on the OS/2 Warp Device Drivers Online.

2. Do not install Windows 95 revision C first as the FAT32 file system will cause problems installing OS/2 Warp 4.

3. Remember that operating systems must be installed in the first two gigabytes (2 GB) in order that they will function.

4. Because you have placed your operating systems on a C: partition and you have two C: partitions on your hard drive and the computers can only see one C: partition at any given time, you will only be able to access one operating system at a time. With the second operating system on a hidden partition, the two operating systems will not conflict with each other.

5. If you create additional data partitions, they will be visible to the operating system only if the operating system can access the file system:

   Operating System	Filesystems Visible
   OS/2 Warp 4	FAT16 and HPFS
   Windows 95 revision C	FAT16 and FAT32

   1. From this you can see that if you use FAT16 to format a data partition both Windows 95 and OS/2 Warp 4 will be able to use the files found on this partition.

   2. If you format the data partition in HPFS, only OS/2 Warp 4 will be able to use the files found on this partition.

   3. If you format the data partition in FAT32, only Windows 95 will be able to use the files found on this partition. Henk Kelder has written a driver called FAT32.IFS, currently available in beta, that allows OS/2 to access FAT32 partitions.