Forcing DMA mode

[lawtai]

Hi, I have a dvd drive that's set to run in PIO mode right now. I changed it to run in DMA mode if available, but after a reboot, it's still running in PIO. How can I get it to run in DMA mode?

[lawtai]

I've tried reinstalling the drivers, and still no luck...anyone?

[username]

are you sure it supports DMA mode? what type of IDE cable are you using?

[Garry]

Make sure your BIOS settings are correct also. What drive is it? Has it ever worked in DMA mode? Which operating system?

[lawtai]

I'm using XP Pro, it's a lite-on DVD drive, which should support DMA. I doubt it's the cable, because I have my burner connected to it as well, and that's using DMA. I have the DVD as master, and the burner on slave. I've actually never checked to make sure it's in DMA before. How would checking bios settings force DMA?

[Garry]

Mmm, some BIOSs allow you to choose PIO mode or DMA mode also. Most, these days, don't. Suppose it depends on the age of your board.

Are you sure the drive does support DMA? Do you have a model number?

[lawtai]

Well, in device manager, it says that it's a liteon dvd-rom ltd163d. Could a firmware update do the trick? I just bought the drive last August, so I would think that it would support DMA.

[Garry]

Yes it does.

http://shop.store.yahoo.com/computer-marke...t/44121324.html

Now we're screwed. If you're gonna do a firmware update, be careful. You could also try experimenting. You know, unplug the writer drive, change master/slave, etc.

Don't suppose you have another machine just to try it in?

[lawtai]

yea, I'm gonna try to switch around master/slave...make the dvd slave and the burner master.

[lawtai]

well, I switched my dvd drive to slave, and the burner to master, and they're both running on DMA now.