why enable DMA with Pioneer DVR-104 burner?

[joeAgain------]

I heard somewhere that I needed to do that with this Pioneer DVD-R burner.

Please tell my why, if that is true, please?

And how do I make the DMA setting stay? I go into Device Manager(In my Win98 computer), I check the DMA box but when I look in there later, the box is Unchecked again. Why is that?

How can I make the setting stay?

Thanks

[Rock Jr]

When u enable the DMA setting, it tells Win98 to restart with DMA enabled but if it detects that the DVD drive is not DMA capable it turns it off.

I had this problem with my DVD rom. It was on the secondary ide channel as a slave, with my CDWriter being the master. The CDWriter is UDMA2 but the DVD was reported as PIO which is *REALLY* slow.
My solution to u is to put u're DVD-R burner to master on the secondary ide channel.

If its already on master then u've got me stumped!

[alb1n0]

DMA stands for Direct Memory Access .
If your device is DMA enabled , all acess with memory needn´t a step via
CPU , meaning less time to move your bits from/to device from/to memory

NO DMA : Device -> CPU -> Memory

WIth DMA : Device - > Memory

One step less , more speed in data transfer....

[joeAgain------]

Hi Rock Jr,

Are you saying you can enable DMA only on the master, but not the slave?

I'm set up like you....CD-RW as master, DVD-R as slave.

If I do that, then are you saying my CD drive will not get DMA enabled? I use that more than my DVD drive. Can we not do it for both somehow?

[joeAgain------]

Alb1no,
Yes, I'd heard that. And it always seemed like a good idea.

But had also heard that "some problems" could arise and wondered what folk here thought about the benefits as opposed to hassles it has caused them personally.

[Rock Jr]

Hey JoeAgain,

I've never had any problems with me DVD as Master and me CDRW as a slave.

B4 I changed me DVD to Master, me CDRW was reported as Ultra DMA mode 2 but me DVD rom was reported as PIO mode. I figured it was a bit fishy so I switched 'em

Now, me CDRW is still reported as Ultra DMA mode 2 *AND* me DVD rom is reported as Ultra DMA mode 4.

As for the speed gain, well its definitely a *BIG* improvement. From a measly 2-3x read speed, its now reading between 11-14x!!

I'll let u decide JoeAgain whether u want the improvement or not. If it gives u hassle, put your CDRW as slave on the primary ide channel and leave your DVD-R as master only on your sec ide channel.