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How to Obtain Dmacheck.exe for Windows NT

Article ID: 191774 - View products that this article applies to.

This article was previously published under Q191774

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.

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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:

152734

(http://support.microsoft.com/kb/152734/EN-US/ )

How To Obtain the Latest Windows NT 4.0 Service Pack

The following files are available for download from the Microsoft Download Center:

Alpha:

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Download Dmachcka.exe now

(http://download.microsoft.com/download/winntsrv40/utility/1.0.0.1/alpha/en-us/dmachcka.exe)

Intel:

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Download Dmachcki.exe now

(http://download.microsoft.com/download/winntsrv40/utility/1.0.0.1/nt4/en-us/dmachcki.exe)

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591

(http://support.microsoft.com/kb/119591/EN-US/ )

How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

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