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Microsoft KB Archive/102406

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Knowledge Base

Fastback Runs Very Slowly with Windows NT

Article ID: 102406

Article Last Modified on 11/1/2006


  • Microsoft Windows NT Advanced Server 3.1
  • Microsoft Windows NT Workstation 3.1
  • Microsoft Windows NT Advanced Server 3.1

This article was previously published under Q102406


Fifth Generation Systems Fastback and Fastback Plus run very slowly in Windows NT.


This problem occurs because Fastback directly programs the floppy disk controller (FDC) to increase the speed of floppy disk reads and writes.

Unfortunately, Windows NT has to trapping all input and output in the virtual DOS machine (VDM), which causes the floppy reads and writes to be slower instead of faster.

Additional query words: prodnt I/O

Keywords: kb3rdparty KB102406