DMA modes - Club CDFreaks

Technodreamer · 29-12-2004

My drive produces error in Ultra DMA mode 4, due to a firmware bug in many Pioneer drives, so I put it down to "Multi word" DMA 2.

How will this effect it's preformance? I have a 16x speed DVD writer, so will it prevent me from reaching the high speeds?

Can someone please explain what PIO, DMA, "Multi word" and Ultra DMA are to me?

Should I be concerned that it doesn't reach Ultra DMA modes? Will an update to my motherboard BIOS correct the situation?

*ako* · 29-12-2004

should work fine in udma 2, you can test your burst rate using cd/dvd speed so long as you get over 20 you`ll be ok

Technodreamer · 29-12-2004

No not UDMA mode 2. Just DMA mode 2

I got 14 with a DVD+RW and 13 with a Data CD.

What is the burst rate?

*ako* · 29-12-2004

Quote:

Originally Posted by Technodreamer

What is the burst rate?

its the rate at which data can be read from you drive.

i don`t know if using a RW will give lower readings try it with a dvd R.

Technodreamer · 30-12-2004

With a DVD-ROM I get 14 MB/s

WHat if I set it to a weird UDMA mode?

Technodreamer · 30-12-2004

I tried Ultra DMA mode 2 (It is ussposed to be 4) and it seemed to work fine. When I went to Ultra DMA mode 4 it gave me a Logic unit communication crc error. Does using Ultra DMA modes that were no specified as supported by the product hurt?

Oh I see. 80 pin cables are needed for Ultra DMA modes above 2

Technodreamer · 30-12-2004

Solved. It supports: Ultra DMA modes above 2

Ultra DMA modes above 4 requires an 80 pin cable. Upon opening my computer I see only my hard drives have it.

29-12-2004	#1 (permalink)
Technodreamer New on Forum Join Date: Dec 2004 Posts: 18	DMA modes <a href='http://adstats.cdfreaks.com/www/delivery/ck.php?n=a13febf7&cb=INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://adstats.cdfreaks.com/www/delivery/avw.php?zoneid=30&cb=INSERT_RANDOM_NUMBER_HERE&n=a13febf7' border='0' alt='' /></a> My drive produces error in Ultra DMA mode 4, due to a firmware bug in many Pioneer drives, so I put it down to "Multi word" DMA 2. How will this effect it's preformance? I have a 16x speed DVD writer, so will it prevent me from reaching the high speeds? Can someone please explain what PIO, DMA, "Multi word" and Ultra DMA are to me? Should I be concerned that it doesn't reach Ultra DMA modes? Will an update to my motherboard BIOS correct the situation?

29-12-2004	#2 (permalink)
ako CDFreaks Resident Join Date: Mar 2004 Location: derby, uk Posts: 2,055	Re: DMA modes should work fine in udma 2, you can test your burst rate using cd/dvd speed so long as you get over 20 you`ll be ok

29-12-2004	#3 (permalink)
Technodreamer New on Forum Join Date: Dec 2004 Posts: 18	Re: DMA modes No not UDMA mode 2. Just DMA mode 2 I got 14 with a DVD+RW and 13 with a Data CD. What is the burst rate? Last edited by Technodreamer; 29-12-2004 at 23:40.

30-12-2004	#5 (permalink)
Technodreamer New on Forum Join Date: Dec 2004 Posts: 18	Re: DMA modes With a DVD-ROM I get 14 MB/s WHat if I set it to a weird UDMA mode? Last edited by Technodreamer; 30-12-2004 at 00:28.

30-12-2004	#6 (permalink)
Technodreamer New on Forum Join Date: Dec 2004 Posts: 18	Re: DMA modes I tried Ultra DMA mode 2 (It is ussposed to be 4) and it seemed to work fine. When I went to Ultra DMA mode 4 it gave me a Logic unit communication crc error. Does using Ultra DMA modes that were no specified as supported by the product hurt? Oh I see. 80 pin cables are needed for Ultra DMA modes above 2

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30-12-2004	#7 (permalink)
Technodreamer New on Forum Join Date: Dec 2004 Posts: 18	Re: DMA modes Solved. It supports: Ultra DMA modes above 2 Ultra DMA modes above 4 requires an 80 pin cable. Upon opening my computer I see only my hard drives have it.

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