MS-DOS 6 Upgrade Setup Err Msg: Current Drive Must Be Set to A (97420)
The information in this article applies to:
• Microsoft MS-DOS operating system 6.0
• Microsoft MS-DOS operating system 6.2
• Microsoft MS-DOS operating system 6.21
• Microsoft MS-DOS operating system 6.22
This article was previously published under Q97420
You may receive the following error message if you attempt to install
MS-DOS from a drive other than A:
This error message can occur when one or more of the following
• Your CMOS settings are incorrectly set and do not include your
floppy disk drive.
• You are using a high-capacity optical drive with removable disks
(called a "floptical" drive) and the device driver for it is
incompatible with Setup.
• You are using an external floppy disk drive and the device driver
for it is incompatible with Setup.
• You are using a 2.88-megabyte (MB) floppy disk controller. (Some of
these use extended BIOS chip sets that are incompatible with Setup.)
If your drive C has at least 9 MB free space, you can work around this
problem by copying the MS-DOS 6 Upgrade files to your hard disk drive
and running Setup from your hard disk drive. To do this, use the
• Create a temporary directory on your drive C. For example, type MD
DOSTEMP at the MS-DOS command prompt
and then press ENTER.
• Copy the MS-DOS Upgrade files from each floppy disk to the
DOSTEMP directory. For example, type copy b:\*.* c:\dostemp at the MS-DOS command prompt and then press
• To run Setup, type c:\dostemp\setup
at the MS-DOS command prompt and then press ENTER.
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