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# MS-DOS Err Msg with DiscTec: Unrecoverable Disk Error

Article ID: 105062

Article Last Modified on 5/6/2003

APPLIES TO

- Microsoft MS-DOS 5.0 Standard Edition
- Microsoft MS-DOS 5.0a
- Microsoft MS-DOS 6.0 Standard Edition
- Microsoft MS-DOS 6.2 Standard Edition
- Microsoft MS-DOS 6.21 Standard Edition
- Microsoft MS-DOS 6.22 Standard Edition

This article was previously published under Q105062

## SYMPTOMS

You may receive the following error message when you try to install MS-DOS:
Unrecoverable Disk Error
Hard Disk is not readable.

## CAUSE

This problem occurs when the DiskStor DISCTEC.SYS removable device driver is loaded in memory.

## RESOLUTION

To work around this problem:

1. Edit your CONFIG.SYS file to remark out (REM) the command for DISCTEC.SYS.
2. Restart your computer.
3. Install MS-DOS.
4. Edit your CONFIG.SYS file and add the `DISCTEC.SYS` command.
5. Restart your computer.

Additional query words: 6.22 6.20 stepup Upgrade Step-Up

Keywords: KB105062