KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q40435: SMARTDrive Does Not Support Conventional Memory

Article: Q40435
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:4.x,5.x,6.0,6.2,6.21,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 17-DEC-2000

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft MS-DOS operating system versions 4.0, 4.01, 5.0, 5.0a, 6.0, 6.2, 6.21, 6.22 
-------------------------------------------------------------------------------

SUMMARY
=======

SMARTDrive, the MS-DOS disk caching driver, supports the use of extended memory
and expanded memory, but not conventional memory. SMARTDRV.SYS was designed as a
disk caching program for environments with memory that MS-DOS does not use
heavily: extended and expanded memory. The maximum 640K of conventional memory
is so valuable that most people don't waste it with disk caching.

Most people would rather use this precious conventional memory for running
programs, and not for SMARTDrive to speed up their systems. However, if you do
want to use SMARTDrive to speed up your system, there are two upgrade paths
available, which are as follows:

- Obtain an expanded memory board (or software to emulate an expanded memory
  board, such as the MS-DOS version 4.0 driver EMM386.SYS).

-or-

- Obtain an extended memory board.

SMARTDrive can be used in the extended or expanded memory areas. MS-DOS original
equipment manufacturers (OEMs) may choose to modify SMARTDrive to support
conventional memory if they decide that the memory choices SMARTDrive was
designed with are not adequate.

Additional query words: 6.22 4.00 4.01 5.00 5.00a 6.00 6.20

======================================================================
Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS400 kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600 kbMSDOS500 kbMSDOS401 kbMSDOS500a
Version           : MS-DOS:4.x,5.x,6.0,6.2,6.21,6.22

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 1986-2002.