DMA to Ultra DMA?

[Schuleman]

I have read the article on DMA and mine shows it is using muti word DMA mode 2. Is there a way to upgrade this?

[techreactor]

Multi-Word DMA mode 2 = 16.5 MB/s max transfer rate

Ultra DMA Mode 5 = max 100 MB/s transfer rate

For Ultra DMA mode 5, the support from all of the components are required i.e. HDD/Drives, Controller, OS and conductor cable.

Any one of these being not compliant will put it into other compatible modes.

Since the OS detects it, it cannot be changed.

[blutach]

The MW DMA is probably a function of the speed (and age) of your PC. Probably nothing that can be done.

Regards

[Chewy]

16x burning or reading is 22 MB/s

"Bus mastering DMA finally came into its own when the industry moved on to Ultra DMA. Once Ultra DMA/33 doubled the interface transfer rate, DMA had an obvious speed advantage over PIO in addition to its other efficiency improvements. Support for DMA was also cleaned up and made native in Windows 9x, and most of the problems with the old drivers were eliminated. Today, the use of Ultra DMA is the standard in the industry"

http://www.pcguide.com/ref/hdd/if/ide/modesDMA-c.html

"The result was the creation of a new type of DMA transfer modes, which were called Ultra DMA modes."

"Double transition clocking is what allows Ultra DMA mode 2 to have a maximum transfer rate of 33.3 MB/s despite having a clock cycle time identical to "regular DMA" multiword mode 2, which has half that maximum."

I don't like the sound of 16MB/s, something's not kosher.


"

[Schuleman]

Thanks for the info. sounds like its time for an upgrade.