DMA types

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zero

Can some expert list the differnet DMA ratings and what you would expect ?

e.g. Hard Drive DMA 5
CD-RW DMA 1 (made up examples)


thanks
 
Not at all clear what you are asking.

Try again,
Click to expand...

I think he is asking for ATA equivilants

UDMA 6 = ATA 133

UDMA 5 = ATA 100
(usually occurs in modern hard drives)

UDMA 4 = ATA 66
(older hard drives, some new CDRW burners)

UDMA 2 = ATA 33
(most CD-ROMS, and older burners)

Can someone verify this, I'm just taking this off what I see on the
computer when it boots.
 
I think thats what i mean !

its to aid checking that my hard drives or writers are performing correctly

dma enabled etc.

thanks
 
DMA = Direct Memory Access
The numbers generally mean which channel you are using (I don't think you
can share)
Certain ones (I can't remember) are 8 bit, while others are 16bit, IIRC.
You do want it enabled for performance. Look for conflicts with sound cards
if there are problems, IIRC.
 
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