How to Obtain Dmacheck.exe for Windows NT

ID: Q191774

The information in this article applies to:

Microsoft Windows NT Server version 4.0
Microsoft Windows NT Workstation version 4.0

SUMMARY

Windows NT 4.0 Service Pack 3 includes a utility called DMACheck (Dmacheck.exe) that lets you view the (Direct Memory Access) DMA usage on your computer.

MORE INFORMATION

The following information is listed for each IDE/ATAPI Channel detected:

Current DMA Usage

This value indicates whether DMA is currently being used for each channel. There are 3 possible values:

DMA In Use indicates that DMA transfers are being used on this channel.

DMA Not In Use indicates that DMA transfers are not being used on this channel and that the IDE/ATAPI driver is defaulting to Programmed I/O (PIO) transfer methods.

No IDE/ATAPI Devices Detected indicates that the utility could not read the status of that channel from the registry, either because there was no IDE/ATAPI device present or because the current user has insufficient privileges to access the registry. These settings cannot be changed and are dependent on the DMA support provided by your hardware and the value of the DMA detection settings.

DMA Detection Status

This setting indicates whether the ATAPI driver will attempt to detect and use DMA support on a given channel.

If DMA detection is disabled on a channel, the ATAPI driver defaults to PIO transfers on that channel. If DMA detection is enabled on a channel, the ATAPI driver queries the hardware for DMA support and if it is detected uses DMA for data transfers.

If the hardware does not correctly support DMA transfers, PIO is used even if DMA detection is enabled.

When the utility initially starts, radio buttons indicate the current settings for each channel. To change the detection status, click the preferred setting and it is saved when you exit DMACheck.

How to Obtain DMACheck

You can obtain DMACheck from the following folders on the Windows NT 4.0 Service Pack 3 compact disc:

Support\Utils\i386

Support\Utils\Alpha

For additional information about how to obtain the latest Service Pack, click the article number below to view the article in the Microsoft Knowledge Base:

Q152734 How To Obtain the Latest Windows NT 4.0 Service Pack

The following files are available for download from the Microsoft Download Center. Click the file names below to download the files:

Dmachcka.exe

Dmachcki.exe

For more information about how to download files from the Microsoft Download Center, please visit the Download Center at the following Web address

http://www.microsoft.com/downloads/search.asp

and then click How to use the Microsoft Download Center.

Additional query words: sp3

Keywords : kbfile
Version : winnt:4.0
Platform : winnt
Issue type : kbinfo