Using SCSI Devices that Require Device Drivers (104995)
The information in this article applies to:
- Microsoft MS-DOS operating system 5.0
- Microsoft MS-DOS operating system 5.0a
- Microsoft MS-DOS operating system 6.0
- Microsoft MS-DOS operating system 6.2
- Microsoft MS-DOS operating system 6.21
- Microsoft MS-DOS operating system 6.22
This article was previously published under Q104995 SUMMARY
Your computer may not operate properly if you have a SCSI controller
installed but do not have a SCSI device driver loaded in your CONFIG.SYS
file. A SCSI driver can serve one or more of the following purposes:
- Use Virtual DMA Services (VDS) to correctly compute physical
addresses
- Fix bugs in the SCSI controller ROM BIOS
- Add features not included in the SCSI controller ROM BIOS
If your SCSI device driver is not loaded, you may have problems
ranging from occasional system hangs to complete disk data loss. These
symptoms are usually accelerated if you are using an upper memory
block (UMB) provider (such as EMM386.EXE) or you are running Windows
in 386 enhanced mode.
RESOLUTION
If you don't have the correct driver for your SCSI controller, contact
your SCSI hardware vendor. In the interim, adding the following
command to your CONFIG.SYS file may help to work around the problem:
DEVICE=C:\DOS\SMARTDRV.EXE /DOUBLE_BUFFER
Modification Type: | Major | Last Reviewed: | 5/6/2003 |
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Keywords: | KB104995 |
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