Ultra DMA

This is a protocol originally developed by Quantum and Intel for transferring data between a computer's hard disk and its memory. The maximum burst rate of an Ultra DMA hard drive is 33.3 MBps. The original DMA (Direct Memory Access) protocol served the same purpose as Ultra DMA, but could only transfer data at half the speed. Thanks to Ultra DMA, programs can open faster and run more smoothly. This is because Utlra DMA can send more data to the memory in less time than hard drives that don't support Ultra DMA. Also, Ultra DMA has a built-in utility called Cyclical Redundancy Checking (CRC) which helps protect data better than earlier protocols. So if you want a nice, fast hard drive, look for one that supports Ultra DMA.