dma on hd won't work

[tsd 0]

Dma on my harddrive in Windows 2000 won't work. It worked fine in Windows 98.If I choose dma if available in the system manager it will only get PIO even thougt I know the hd can handele dma mode. Any solutions to this? The drive is a 10 GB Quantum ata/33.

[CrazyKillerMan 0]

yep

Does the ide channel that contains the hd have another peice of hardware on it? If so the lowest speed will only be supported. Now for me....this wasnt true...but it still wouldnt work...i went here http://www.tweak3d.net/tweak/win2kmem/2.shtml

but....this only has a reg file for dma66. But, it also shos how to edit yourself as well. Tell me if this is any help...

[tsd 0]

I was on the tweak3d site and took a look in the registry but I couldnt find the settings about the dma. Probably not the same settings with dma33...

[tsd 0]

By the way I got two hds on the channel. The slowest and oldest hd on that channel works in ultra dma mode but my newer hd dont work, but both hds worked in dma mode in win 98... So my newer hd works in lower speeds than the old one now because of that. It just shows 3 MB/S according to neros test program. In win 98 it showed 13 MB/S so I would really want dma to work...

[Down8 0]

Well, I did get mine working, so thank you Crazy for the link. I hope you get yours working too, tsd.

 

-bZj

[CrazyKillerMan 0]

hmmm.....yes....i can see how that would be different.....i just dl'd the reg file, i didnt edit it manually....its actually not there at all....odd...i wish i could help you more

[tsd 0]

Well, I got to the tweak3d site and used the reg file there. And now it's working! I thought it was just for ata66 drives, but it works fine for ata33 to...

[tsd 0]

It seemed to be just temporary, when I restarted the computer the next time the hd was back in PIO mode again. Very strange...

[sapiens74 0]

it depends on the motherboard you are using as to whether the IDE controller is capable of supporting two devices at different speeds. ALL new ATA 66 and ATA 100 controllers can support 2 devices at different speeds......I.E CDROM and ATA 100 HD on same cable both achieving maximum speeds.

 

I've had problems thi with certain name brand HD's on certain contollers tho and sometimes you have to do a little trial and error till you get the right configuration. Try using a new cable and maybe putting second hard drive on the second controller.

 

 

My 2 sense

 

Laterz

[tristan777 0]

i was told that having the cd-rom and hdd on the same channel would speed up the transfer between the 2, but no i'm reading that it actually slows them down because only 1 device on the channel can be used at a time? which is true? should i move my cd rom to the other channel? thx.

 

also what chipset do u got? i never could get DMA to work on my old MVP3 based board, but i got a A7V now and DMA works fine. hehe. strange since they both VIA...

[sapiens74 0]

Having the cdrom on the same channel as your hard drive wont slow it down although its probably wiser just so they have 2 clear channels.

[tsd 0]

I got an Abit KT7 motherboard. So I don't think the motherboard has anything to do with it. And it worked fine in Windows 98.

[CrazyKillerMan 0]

having the cd rom on the same ide channel is fine...as long as the cdrom is dma 66 (or 33 in yer case)....otherwise the ide channel runs at the slowest compatible speed...

[sapiens74 0]

http://www.quantum.com/src/whitepapers/wp_ultraata66.htm

 

 

Read that guys you can use a UDMA 33 drive and an ATA 66 Drive both at max speeds when using an ATA 66 or 100 Controller

[SuperG 0]

I was getting that same pio crap when I was trying to run raid on my abit bx133 motherboard, a 60 gig striping raid partition took like 6 hours to format or something. I finally found out it was in pio. The ata 100 raid controller is screwed up I think, now the agp slot doesnt work NOW I am on my gf's pc.... celeron 500... compaq...win 98, coough weeeze

-Super

[tsd 0]

Well, I moved the hd to the second ide channel together with my cd writer and now the hd seems to run in Ultra Dma mode every time I boot win2000. Strange. But it works. But I don't know if the cdrom slows down the hd. But it seems to run at the same speed as it did on the first ide channel.