Q94331: Disk Error Messages with ASPI2DOS.SYS Device Driver

Article: Q94331
Product(s): Microsoft Disk Operating System
Version(s): MS-DOS:6.0,6.2,6.21,6.22
Operating System(s): 
Keyword(s): 
Last Modified: 16-NOV-1999

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The information in this article applies to:

- Microsoft MS-DOS operating system versions 6.0, 6.2, 6.21, 6.22 
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SYMPTOMS
========

ASPI2DOS.SYS is an Adaptec driver for the Adaptec AHA 1520 and AHA 1522 SCSI
controllers. If SMARTDrive is used to cache a drive when ASPI2DOS.SYS is
installed, you may receive the following error message from the Adaptec
controller:

  A serious disk error has occurred while writing to drive C.

When you run Microsoft Anti-Virus (MSAV.EXE), you receive the following error
message:

  Not ready reading (or writing) drive C:

Similar errors may also occur while running Microsoft Defragmenter (DEFRAG.EXE)
and Microsoft Undelete (UNDELETE.EXE).

NOTE: The SMARTDrive double-buffer driver does not prevent these errors.

CAUSE
=====

This problem occurs if you use the ASPI2DOS drivers shipped with EZSCSI versions
2.02 and 2.03.

RESOLUTION
==========

This problem was corrected in EZSCSI versions 2.04, 3.0, and later. These are
available for free from Adaptec.

MORE INFORMATION
================

This problem usually occurs during frequent alternating reads and writes by
programs such as Microsoft Anti-Virus and SMARTDrive.

Additional query words: 6.22 6.00 6.20 uma double_buffer external

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Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS621 kbMSDOS622 kbMSDOS620 kbMSDOS600
Version           : MS-DOS:6.0,6.2,6.21,6.22

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