MS-DOS Does Not Properly Process Hard Disk Hardware Errors

Data corruption may occur when you are using an MS-DOS-based program in MS-DOS mode if your hard disk has a hardware error. Your computer is in MS-DOS mode if you started your computer with a system startup floppy disk, or if you selected Command Prompt Only from the Startup menu, or if you selected Restart in MS-DOS mode from the Shut Down Windows dialog box. It only occurs in Windows if the Performance tab of the System tool in Control Panel indicates that the disk file system is using MS-DOS Compatibility mode.
This problem can occur if MS-DOS does not process hard disk errors correctly when the hard disk is being accessed by using LBA mode (extended interrupt 13). This can cause data to be returned that has not really been read or the failure to completely write data to the disk. In either case, no failure is returned to the program.
The following files are available for download from the MicrosoftDownload Center:

Windows 98 and Windows 98 Second Edition (SE)

Windows Millennium Edition (Me)

The English version of this fix should have the following file attributes or later.

Windows 98

   Date           Time   Size       File name        ------------------------------------------   30-Nov-2001    21:31  222,670    Io.sys				

Windows 98 Second Edition

   Date          Time   Size       File name        -----------------------------------------   01-Dec-2001   15:37  222,670    Io.sys				

Windows Millennium Edition (Me)

   Date          Time   Size       File name        -----------------------------------------   29-Nov-2001   12:29  110,080    Io.sys				
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 311561 - Last Review: 06/19/2014 14:00:00 - Revision: 1.0

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