Re: UltraDMA/33, UDMA Mode 2 the same??

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Article #1951

#1951

From: Peter Hucker
Date: Sat, 04 Oct 1997 00:00

36 lines
2350 bytes

"Sander Verweij" <sverweij@wirehub.nl> wrote in
alt.comp.hardware.pc-homebuilt:
>Hello,
>
>A few days i'm searching for info and support on "the" UltraDMA/33 mode,
>and i found all kind of info about it, but it makes no sense.. (for =
me)..=20
>
>my  ABIT-PX5 supports UltraDMA/33
>my Quantum Fireball ST 3.2 is a UltraDMA/33 drive....
>
>So that should be no problem.. Now i boot and i see:=20
>
>(first drive:)  UDMA Mode 2, but UDMA Mode 2 is only 16.6 MB/s (see =
this):
>
>DMA Mode Cycle timetransfer rate
>Single word(ns) (MB/s)
>0 	960 	2.1	 ATA
>1	480	4.2	 ATA
>2	240	8.3	 ATA
>Multiword
>0	 480	 4.2	 ATA
>1	 150	 13.3	 ATA-2
>2	 120	 16.6	 ATA-2
>3	 60	 33.3	 Ultra-ATA=20

Do you have another drive aswell?  I have a slower drive on
the same ribbon cable as an ultra-ata, and see no speed
increase.  It's showing up as udma 2 - the same as yours.  I
think you need the ultra ata drives on their own.


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http://www.fortunecity.com/lavendar/stroheim/52/index.html

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From: hucker@globalnet.co.uk (Peter Hucker)
Subject: Re: UltraDMA/33, UDMA Mode 2 the same??
Date: 1997/10/04
Message-ID: <343f348e.2943118@news.globalnet.co.uk>
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Sender: hucker@globalnet.co.uk
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