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1997-05-08
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OSINDBOT - ADDING DUAL-BOOT PROCEDURES FOR OS/2 - ALL RELEASES
01/24/96
=======================================================================
Adding Dual-Boot Procedures for OS/2--All Releases
=======================================================================
Please Read Entire Document for Full Explanation of Procedures
--------------------------------------------------------------
DESCRIPTION
This document explains how to add a Dual Boot capability to OS/2, and
how to recover from the inability to switch from DOS to OS/2 or OS/2 to
DOS.
RESOLUTION
Note: Make sure you have a backup copy of any file you intend to change.
Using Dual Boot in OS/2 Warp
----------------------------
When you install OS/2 Warp using the Easy Installation method, a Dual
Boot feature is automatically set up. Dual Boot lets you switch between
OS/2 and DOS.
Dual Boot also determines which operating system should start when you
turn on the computer. Each time you shut down and restart, the computer
starts in the operating system that was used last. For example, if you
shut down your system while running DOS, the system starts in DOS the
next time you turn it on.
If Dual Boot Does Not Work in OS/2 Warp
---------------------------------------
If the BOOT command is unsuccessful when you try to switch from DOS to
OS/2, you might have programs running that take up too much memory. If
so, close the programs before using the BOOT command. If the programs
are loaded from your AUTOEXEC.BAT file, you should deactivate the
programs before using the BOOT command.
Starting the Dual Boot Feature in OS/2
--------------------------------------
Use the Dual Boot function to switch from one operating system to
another.
Switching from OS/2 to DOS
--------------------------
1. Open OS/2 System.
2. Open Command Prompts.
3. Select Dual Boot.
4. When a message appears asking if you want your system to be reset,
type Y and press Enter.
Switching from DOS to OS/2
--------------------------
At the DOS command prompt, type C:\OS1\BOOT /OS2 and press Enter.
Installing DOS after Installing OS/2 Warp
-----------------------------------------
If you installed OS/2 on drive C and formatted the drive with the FAT
file system, and DOS is not installed, your system has Dual Boot
capability. OS/2 automatically installs the Dual Boot icon. However,
you must install DOS to use the Dual Boot feature.
To add Dual Boot after installing OS/2:
1. Open OS/2 System.
2. Open Command Prompts.
3. Select Dual Boot. A Warning box appears reminding you that DOS is
not installed and asks if you want to continue.
4. Type Y and press Enter. A message indicates your system is being
prepared. When you see the warning to shut down your system, press
Enter to close the window.
5. Shut down your system:
a. Move the mouse pointer to a blank space on the Desktop; then
press mouse button 2. The pop-up menu appears.
b. Select Shutdown.
c. When prompted, turn off your computer.
6. Install DOS as described in the instructions that came with the DOS
package.
7. At the DOS command prompt, type C:\OS2\BOOT /OS2 and press Enter.
This returns you to the OS/2 Desktop.
Adding Dual Boot Capability to OS/2
-----------------------------------
1. At the command prompt, type E CONFIG.DOS and press Enter to edit the
CONFIG.DOS file.
2. Add the following statement to the file:
SHELL=C:DOS\COMMAND.COM /P /E:25
3. Save and exit the file. If prompted for a file type, select Type...
and then Plain Text.
If CONFIG.DOS or AUTOEXEC.DOS does not exist, create them and add
the above statement.
4. From an OS/2 Full Screen session, type the following, pressing Enter
after each:
CD C:\DOS
DIR COMMAND.COM
If COMMAND.COM is not in the directory, use the following command to
copy it from the root directory, and press Enter:
COPY C:\COMMAND.COM C:\DOS\COMMAND.COM
5. Type BOOT /DOS and press Enter.
When asked if you wish to continue, type Y and press Enter.
6. After DOS starts, go to a DOS prompt and type the following, pressing
Enter after each:
CD C\OS2
BOOT /OS2
7. When asked if you wish to continue, type Y and press Enter. The
system restarts; then OS/2 starts.
Recovering Dual Boot in OS/2
-----------------------------
If both OS/2 and DOS are installed, but you cannot switch between them,
perform whichever of the following procedures is appropriate.
Cannot Switch from OS/2 to DOS
------------------------------
1. Start OS/2 from the hard disk.
2. Shut down the system.
3. Insert a DOS bootable diskette in drive A; then restart the system.
4. Type the following, pressing Enter after each:
C:
COPY C:\CONFIG.SYS C:\OS2\SYSTEM\CONFIG.OS2
COPY C:\AUTOEXEC.BAT C:\OS2\SYSTEM\AUTOEXEC.OS2
COPY C:\OS2\SYSTEM\AUTOEXEC.DOS C:\AUTOEXEC.BAT
COPY C:\OS2\SYSTEM\CONFIG.DOS C:\CONFIG.SYS
DEL C:\OS2\SYSTEM\CONFIG.DOS
DEL C:\OS2\SYSTEM\AUTOEXEC.DOS
RENAME C:\OS2\SYSTEM\BOOT.DOS C:\OS2\SYSTEM\TEMP
A:
SYS C:
5. Remove the diskette from drive A and restart the system.
Note: If SYS.COM cannot be found on drive A, copy it from the \DOS
subdirectory on the hard disk.
Cannot Switch from DOS to OS/2
------------------------------
1. Start DOS from the hard disk.
2. Insert the Installation Diskette in drive A and restart the system.
3. When prompted, remove the Installation Diskette and insert
Diskette 1.
3. When the Welcome screen appears, press Esc to get to the command
prompt.
4. At the A: prompt, type C: and press Enter.
5. Type the following, pressing Enter after each:
COPY C:\CONFIG.SYS C:\OS2\SYSTEM\CONFIG.DOS
COPY C:\AUTOEXEC.BAT C:\OS2\SYSTEM\AUTOEXEC.DOS
COPY C:\OS2\SYSTEM\AUTOEXEC.OS2 C:\AUTOEXEC.BAT
COPY C:\OS2\SYSTEM\CONFIG.OS2 C:\CONFIG.SYS
DEL C:\OS2\SYSTEM\CONFIG.OS2
DEL C:\OS2\SYSTEM\AUTOEXEC.OS2
RENAME C:\OS2\SYSTEM\BOOT.OS2 BOOT.OLD
A:
6. Insert the Installation Diskette in drive A; then type SYSINSTX C:
and press Enter.
7. Remove the diskette from drive A and restart the system.
Note: If SYS.COM cannot be found on drive A, copy it from the \DOS
subdirectory on the hard disk.
______________________________________________________________________
IBM disclaims all warranties, whether express or implied, including
without limitation, warranties of fitness and merchantability with
respect to the information in this document. By furnishing this
document, IBM grants no licenses to any related patents or copyrights.
Copyright (c) 1994, 1995 IBM Corporation. Any trademarks and product
or brand names referenced in this document are the property of their
respective owners. Consult your product manuals for complete trademark
information.