Article ID: 232545
Article Last Modified on 1/24/2007
APPLIES TO
- Microsoft Windows Millennium Edition
- Microsoft Windows 98 Second Edition
- Microsoft Windows 98 Standard Edition
This article was previously published under Q232545
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SUMMARY
This article describes Ultra DMA (Direct Memory Access).
MORE INFORMATION
Ultra DMA (also known as Ultra DMA/33 or ATA/33) is an extension of the ATA hard disk interface that theoretically allows burst data transfer rates of 33.3 megabytes (MB) per second. This is double the ATA-2/ATA-3 standard of 16.6 MB per second. Using Ultra DMA can result in a 40 percent increase in performance over the ATA-2/ATA-3 standard. The performance improvement is a result of the improved data rate of the drive itself.
System Requirements
- A motherboard that has a chip set that supports Ultra DMA.
- An Ultra DMA-compliant hard disk and controller.
- An Ultra DMA device driver.
- An Ultra DMA-compliant Basic Input/Output System (BIOS).
Using Ultra DMA
To use an Ultra DMA device, verify that your computer supports Ultra DMA, and then follow the manufacturer's instruction to install the Ultra DMA-based device.
To determine if your computer supports Ultra DMA-based devices, refer to the documentation included with your device, or contact the manufacturer of the Ultra DMA device.
Additional query words: HWSYSDMA udma
Keywords: kbfaq kbhardware kbinfo KB232545
