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Microsoft KB Archive/101284

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Knowledge Base

Lucid Lightning Disk-Caching Software and SMARTDrive 4.x

Article ID: 101284

Article Last Modified on 11/22/1999


  • 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
  • Microsoft Windows 3.1 Standard Edition
  • Microsoft Windows 3.11 Standard Edition
  • Microsoft Windows for Workgroups 3.1
  • Microsoft Windows for Workgroups 3.11

This article was previously published under Q101284


The setup program for Lucid Lightning disk-caching software does not detect other disk-caching software, such as Microsoft SMARTDrive version 4.x, if it is loaded high in upper memory. If disk-caching software is loaded low, Lucid Lightning disables it. In addition, the installations of Windows 3.1, Windows for Workgroups 3.1, and MS-DOS 6.0 do not detect third-party disk- caching software. As a result, running both disk-caching utilities simultaneously may produce cross-linked files or lost clusters.

To correct this problem, disable one of the two disk-caching utilities by modifying the AUTOEXEC.BAT file.


Lucid Corporation manufactures the following three versions of its Lightning disk-caching software:

  • Lightning version 6.0 for DOS
  • Lightning version 1.21 for Windows
  • Lightning version 1.1 for CD

To disable any version of the Lightning disk-caching software, modify the AUTOEXEC.BAT file as follows:


For more information, call Lucid Corporation Technical Support.

The products included here are manufactured by Lucid Corporation, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Additional query words: 6.22 6.00 6.20 4.0 4.00 4.1 4.10 third party 3rdparty smartdrv

Keywords: KB101284