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- DOCUMENT:Q103509 02-NOV-1993 [W_NT]
- TITLE :Installing Windows NT with IBM Boot Manager Partition Present
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- --------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system version 3.1
- - Microsoft Windows NT Advanced Server version 3.1
- --------------------------------------------------------------------
-
- SYMPTOMS
- ========
-
- When you load Windows NT on a computer that has IBM OS/2 2.x Boot
- Manager, Windows NT Setup detects the presence of the Boot Manager
- partition. Setup states that it has detected the presence of the Boot
- Manager partition and is going to disable it. The text mode portion of
- Windows NT setup will complete to the point of prompting you to
- restart (reboot) the system. Upon rebooting, the computer will boot
- from the operating system that is present on the drive C partition; it
- is impossible to continue the Windows NT installation.
-
- CAUSE
- =====
-
- Installing Windows NT with the Boot Manager partition active appears
- to corrupt the Boot Manager partition. The proper files don't get
- copied to the drive C partition as they should.
-
- RESOLUTION
- ==========
-
- A workaround to this problem is to mark the drive C partition as the
- active partition BEFORE starting the installation of Windows NT. The
- user must then mark the Boot Manager partition as the active partition
- to regain the use of the Boot Manager. The active partition can be
- changed using Disk Manager under Windows NT, or by using FDISKPM under
- OS/2 2.x.
-
- If you have run into the problem identified above (cannot boot Windows
- NT after installing OS/2 and then installing Windows NT), the
- following are steps to correct the situation.
-
- NOTE: This procedure was documented using IBM OS/2 2.0. The procedure
- may or may not be the same for IBM OS/2 2.1. Anytime partition
- information is rewritten, even though slight, the potential for data
- loss exists. It is recommended that data be completely backed up
- before attempting the following procedure.
-
- 1. Insert the IBM OS/2 2.0 Installation Disk in drive A, then restart
- the computer.
-
- 2. When prompted to do so, insert Disk 1.
-
- 3. Press ENTER to pass the Welcome and Information screens.
-
- 4. The next screen offers two choices. Select option 2: "Specify a
- different drive or partition."
-
- 5. The next screen has warning information about modifying partitions.
- If you want to proceed, press ENTER to continue.
-
- 6. The next screen shows available partitions. Move the selector bar
- to the 1 megabyte (MB) Boot Manager partition and press ENTER for the
- options menu.
-
- 7. From the Options menu, choose Install Boot Manager.
-
- 8. Boot Manager will be installed; you will now be able to
- highlight the other partitions and press ENTER to add them to the
- Boot Manager menu. If Install Boot Manager is unavailble or grayed
- out, the previous Boot Manager must be removed.
-
- 9. When you are finished adding partitions to the Boot Manager menu,
- press F3 to exit. You will be prompted with the message "No partition
- with at least 15 megabytes (MB) was set Installable, press any key to
- Continue."
-
- 10. Press F3 again and a menu is displayed. Choose Save And Exit.
-
- 11. At the drive selection screen, press F3 to exit.
-
- 12. At the command prompt, reboot the computer; Boot Manager should
- now be active.
-
- MORE INFORMATION
- ================
-
- An explanation of this problem follows. For the purpose of
- explanation, the example assumes an unpartitioned disk and loading
- OS/2 2.x and then installing Windows NT. The problem exhibits itself
- when OS/2 has been loaded and the Boot Manager is active.
-
- Steps to Reproduce Problem
- --------------------------
-
- 1. Start with a disk that has no partitions defined.
-
- 2. Install OS/2 2.x with Boot Manager enabled. Set up the drive C
- partition for OS/2 so that it is approximately 100 MB. Install OS/2
- on this partition. Assuming you have a 200 MB drive, you will now have
- a 1 MB partition for Boot Manager, a 100 MB partition for OS/2, and
- about 100 MB unpartitioned space.
-
- 3. Add the OS/2 partition to the Boot Manager menu through FDISKPM.
-
- 4. Create a FAT Partition using all of the unused space on the drive.
-
- You will now have the following partitions:
-
- Boot manager
- Drive C: partition with OS/2 installed
- Drive D: partition formatted with Fat.
-
- 5. Make sure that the Boot Manager partition is the startable partition
- through FDISKPM.
-
- 6. Install Windows NT onto the drive D partition from the floppy disk
- or CD-ROM setup.
-
- Windows NT Setup detects the Boot Manager partition and prompts that
- it is disabling the partition during the install and that the
- partition may be reactivated upon completion of installing Windows NT.
-
- 7. Proceed through the text mode portion of setup until prompted to
- reboot.
-
- Upon rebooting, the system WILL NOT boot Windows NT, but WILL boot
- OS/2 2.x from the drive C partition. The drive C partition will now be
- the active partition, but making the Boot Manager partition the active
- partition results in an error that NTLDR cannot be found.
-
- Additional reference words: 3.10 OS/2 Partition Boot Manager Install
- KBCategory:
- KBSubCategory: stp
-
- =============================================================================
-
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-
- Copyright Microsoft Corporation 1993.