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Using OS/2 Boot Manager to install multiple operating systems on a single hard file - IBM PC/IBM IntelliStation

Troubleshooting


Problem

Note: In the following example, DOS/Windows 3.x and Windows 95 are being installed on different partitions of the same hard file. To use the following method you will need: 1. The first three OS/2 installation disks 2. DOS installation disks 3.

Resolving The Problem


Note: In the following example, DOS/Windows 3.x and Windows 95 are being installed on different partitions of the same hard file.

To use the following method you will need:

1. The first three OS/2 installation disks
2. DOS installation disks
3. Windows 3.x installation disks
4. Windows 95 installation disks (NOTE: If you have the Windows 95 installation CD-ROM, you will also need CD-ROM drivers)

To create multiple partitions on the same hard disk you will need to boot your machine with the OS/2 installation disks. As soon as you see the option at the bottom of the screen to Exit to Command Prompt, press the F3 key. You will see a prompt that looks like this: [A:\]

At this prompt, type FDISK. This will start the disk partitioning software. In order to restructure your hard drive you will need to delete any existing partitions. This process will destroy any data contained on the hard drive. Be sure to back up any important files before continuing with this procedure. To delete a partition, highlight it and press Enter. Choose delete on the menu and press Enter again.

To choose between DOS/Windows and Windows 95 at startup you must install a Boot Manager partition. Starting with an unpartitioned hard drive, press Enter. Choose Install Boot Manager and create the Boot Manager partition at the start of the free space. You will see the Boot Manager appear at the top of the list of partitions.

Now create a partition for DOS and Windows to reside in. Highlight the unpartitioned space and press Enter. Choose Create Partition and create a Primary partition at the start of the free space. The size of the partition can be determined by several factors: how large your hard drive is, how many DOS or Windows programs you have, how many personal files you have, and user choice. DOS and Windows require about 12 megabytes just for themselves. If you have several software packages, it may be a good idea to set the partition size to 50 or 60 megabytes. Once you have created the partition, label it DOS-Win and you will see it added to the list of partitions.

Next, create a partition for Windows 95. Highlight the unpartitioned space and press Enter. Choose Create Partition and create a Primary partition at the start of the free space. You can use the rest of the space on your hard disk to dedicate to Windows 95. Keep in mind that Windows 95 requires about 60 megabytes just for itself and may require more, depending on which options you choose to install. You will also need more space depending on how many applications you wish to install. Once you have created the partition, label it Windows 95, and you will see it added to the list of partitions.

Now that you have created all of the partitions, you can install the operating systems. To install DOS in its partition, highlight DOS-Win and press Enter. Choose Set Installable off the menu and press enter. You will see the word "Installable" appear beside DOS-Win in the partition list.

Exit FDISK and press F3 several times until you get the message to restart your machine. Remove the OS/2 diskette from the A: drive and insert the first DOS installation disk. Press CTRL+ALT+DEL to restart the machine. You can now install DOS and Windows normally.

Once you have installed DOS and Windows, insert the first OS/2 disk in the A: drive and reboot the machine. As soon as you see the option at the bottom of the screen to Exit to Command Prompt, press the F3 key. You will see a prompt that looks like this: [A:\]. Type FDISK and press Enter. Highlight the Windows 95 partition and press enter. Choose Set Installable on the menu and press Enter. You will see the word "Installable" appear beside Windows 95 in the partition list. Exit FDISK as before and restart the machine. You will now be able to install Windows 95. If you have the Windows 95 upgrade CD, you will need to install DOS just as above and you will also need to install any drivers for you CD-ROM. The Windows 95 Setup program will ask you for the first Windows disk so there is no need to install Windows 3.x again. If you have the full Windows installation pack, insert the disk that came with it before restarting the machine.

Once you have installed Windows 95, insert the first OS/2 disk in the A: drive and reboot the machine. As soon as you see the option at the bottom of the screen to Exit to Command Prompt, press the F3 key. You will see a prompt that looks like this: [A:\]. Type FDISK and press Enter. Highlight the Boot Manager partition and press Enter. Choose Set Startable on the menu and press Enter. You will see the word "Startable" appear beside Boot Manager in the partition list. Exit FDISK as before, remove any diskette from the A: drive, and restart the machine.

Boot manager menu screen will offer the choice of DOS-Win or Windows 95, indicating that you have successfully set up the two partitions on your hard drive. You can now choose one and boot with that operating system. Any additional software that needs to be installed can be installed normally.

Keep in mind the restrictions inherent to this configuration: you cannot share data between partitions, so a file you save to the C: drive while in DOS-Win will not be available while you are in Windows 95 and any software installed in Windows 95 will not be available in the DOS-Win session.

Document Location

Worldwide

Operating System

Cross Brand:IBM OS/2

Cross Brand:Windows 95

Cross Brand:Windows NT

Cross Brand:Windows 98

Cross Brand:DOS

Cross Brand:Windows 3.x

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Document Information

Modified date:
23 January 2019

UID

ibm1JBAR-3ZJP24