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1992-11-06
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FYI
(Note: The origin of this information may be internal or external
to Novell. Novell makes every effort within its means to verify
this information. However, the information provided in this
document is FOR YOUR INFORMATION only. Novell makes no explicit or
implied claims as to the validity of this information.)
TITLE: OS/2 AND DR DOS COMPATIBILITY
DOCUMENT ID#: FYI-M-1617
DATE: 06NOV92
PRODUCT: OS/2 & DR DOS
PRODUCT VERSION: 6.0
SUPERSEDES: 05JUN92
GENERAL NOTES
DR DOS 6.0 and OS/2 are compatible and will work well together. It
is the full features of DR DOS 6.0 that will be covered in this
document and not the general compatibility. OS/2 is a separate
operating system and uses a separate shell to operate DOS
applications. Many of the features in DR DOS can be operated in
both operating systems, where some will only work while booted
under DR DOS. Other features cannot be utilized because of
conflicts with OS/2, and any use of these features should be done
with extreme caution.
Definitions:
DOS Shell - the DOS shell provided with OS/2. This DOS Shell is
not DR DOS specific, although it will use the EXTERNAL commands in
the DOS PATH.
Virtual Disk - This is the Virtual Disk Image feature of OS/2.
DR DOS FEATURES
DELWATCH Will not operate in a DOS shell under OS/2 or in Virtual
Disk.
DELPURGE Will not operate in a DOS shell under OS/2, but will
function in Virtual Disk.
DISKMAP Operates successfully in the DOS shell, but does not
function in Virtual Disk.
DISKOPT Will not run in the DOS shell. When run in the DR DOS
environment DISKOPT will optimize the DR DOS files but
has no effect on OS/2 files.
PASSWORD Shows incorrect version of operating system in an OS/2
environment. DR DOS files and directories currently
having passwords are not secured.
SCRIPT Shows an incorrect version of the operating system in the
DOS shell.
SECURITY If Security is enabled, OS/2 WILL NOT boot under any
circumstances. Security should not be used.
SuperSTOR Extended partitions of the hard disk can be compressed
with SSTOR.EXE while booted under DR DOS 6.0. These
partitions cannot be read by OS/2 and the driver cannot
be loaded in the OS/2 CONFIG.SYS file. Applications on
the compressed drive will not be accessible while
operating in the DOS shell - they are accessible in the
Virtual Disk.
SuperPCK SuperPCK can be used under either operating system but
will not provide any benefit while booted under OS/2.
OS/2 has its own cache, making SuperPCK unecessary. This
feature should not be used in the Virtual Disk.
TASKMAX Will not operate in a DOS shell under OS/2. OS/2 is a
multi-tasking environment so TASKMAX is unecessary in the
Virtual Disk.
VIEWMAX OS/2 has a graphical interface so VIEWMAX is not
necessary, but it will run in the DOS shell. 2(two)
arrows will be displayed, one for OS/2 and one for
VIEWMAX. Wait until the viewmax arrow (there is a slight
delay in movement between the two arrows) is placed over
the desired action before clicking the mouse button.
UNDELETE Will not operate in a DOS shell under OS/2, but does
function in Virtual Disk.
INTERNAL COMMANDS
These commands are taken over by the OS/2 environment so they are
no longer internal to DR DOS. Refer to your OS/2 documentation for
more information on the internal commands for OS/2.
VER Shows OS/2 in the OS/2 DOS shell but will show DR DOS 6.0
in Virtual Disk.
EXTERNAL COMMANDS
The following DR DOS external commands work with certain
exceptions:
FORMAT With the exception of /S all switches function correctly.
The /S switch will cause the system files to be copied,
but the disk will not be bootable.
TREE Works fine in either environment but provides statistics
in a different format than the OS/2 version.
EDITOR Works fine in DOS shell but has different features than
EDLIN.
MEM Works fine in DOS shell but provides statistics in a
different format than the OS/2 Version.
SYS Copies the system files for DR DOS but the disk is not
bootable. Does work in Virtual Disk, but takes the files
from the disk image not the hard disk.
The following external commands are included with OS/2 and should
be used when in the OS/2 environment:
*CHKDSK.COM, FORMAT.COM, MODE.COM, XCOPY.EXE, DISKCOPY.COM,
DISKCOMP.COM, REPLACE.EXE, COMP.COM, MORE.COM, PRINT.COM, FIND.EXE,
KEYB.COM, BACKUP.EXE, FDISK.COM, RECOVER.COM, LABEL.COM, TREE.COM,
SORT.EXE, UNDELETE.COM, ATTRIB.EXE, RESTORE.EXE, EDLIN.COM, MEM.EXE
*Use of OS/2 CHKDSK /F on any drive formatted with DR DOS 6 or
COMPAQ DOS 3.31 will result in corruption of the file allocation
table. Consult IBM for more details.
Other external commands either do not work in the OS/2 environment
or they function normally, but have not been tested at this time.
Refer to the OS/2 documentation for features that can be utilized
in OS/2 and avoid these conflicts.