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

SYMPTOMS

You may receive the following error message if you attempt to install MS-DOS from a drive other than A:
Current Drive Must be set to A

CAUSE

This error message can occur when one or more of the following conditions exists:
  • 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.)

WORKAROUND

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 following steps:
  1. Create a temporary directory on your drive C. For example, type MD DOSTEMP at the MS-DOS command prompt and then press ENTER.
  2. 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 ENTER.
  3. To run Setup, type c:\dostemp\setup at the MS-DOS command prompt and then press ENTER.
Modification Type:MajorLast Reviewed:11/26/1999
Keywords:KB97420
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