Description of Ultra DMA

ID: Q232545

The information in this article applies to:

Microsoft Windows 98

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: udma


Keywords          : kbhw win98 
Version           : WINDOWS:
Platform          : WINDOWS 
Issue type        : kbinfo

Last Reviewed: June 17, 1999