From: Tim Moore <timothymoore@bigfoot.com>
To: linux-kernel@vger.kernel.org
Subject: Re: UDMA 100 / PIIX4 question
Date: Mon, 19 Mar 2001 13:51:56 -0800 [thread overview]
Message-ID: <3AB67F7C.34E093F8@bigfoot.com> (raw)
In-Reply-To: <Pine.LNX.4.10.10103191448010.5246-100000@coffee.psychology.mcmaster.ca>
Mark Hahn wrote:
>
> > > > I have an IBM DTLA 307030 (ATA 100 / UDMA 5) on an 815e board (Asus CUSL2), which has a PIIX4 controller.
> > > > ...
> > > > My problem is that (according to hdparm -t), I never get a better transfer rate than approximately 15.8 Mb/sec....
> > >
> > > 15MB/s for hdparm is about right.
>
> it's definitely not right: this disk sustains around 35 MB/s.
The 815e does not use a PIIX4 chipset. My references were to PIIX4
chipsets.
> nonsequitur: the controller and disk are both quite capable of
> sustaining 20-35 MB/s (depending on zone.) here's hdparm output
> for a disk of the same rpm and density as the DTLA's:
>
> Timing buffer-cache reads: 128 MB in 1.07 seconds =119.63 MB/sec
> Timing buffered disk reads: 64 MB in 2.02 seconds = 31.68 MB/sec
>
> (maxtor dm+45, hpt366 controller)
> regards, mark hahn.
Again, this is not a PIIX4 chipset.
rgds,
tim.
--
next prev parent reply other threads:[~2001-03-19 21:53 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-18 16:53 UDMA 100 / PIIX4 question quintaq
2001-03-19 19:21 ` Tim Moore
2001-03-19 19:33 ` Jeremy Jackson
2001-03-19 20:17 ` Tim Moore
2001-03-19 22:22 ` quintaq
2001-03-20 16:11 ` Holger Lubitz
2001-03-20 17:33 ` Jeremy Jackson
2001-03-20 20:21 ` quintaq
2001-03-20 21:32 ` Mark Hahn
2001-03-21 9:56 ` quintaq
2001-03-21 16:26 ` quintaq
2001-03-21 16:38 ` Mike Dresser
2001-03-23 10:27 ` quintaq
2001-03-21 19:18 ` Tim Moore
2001-03-21 19:29 ` Andre Hedrick
2001-03-22 13:21 ` Holger Lubitz
2001-03-23 10:27 ` quintaq
2001-03-21 19:14 ` Tim Moore
2001-03-23 10:27 ` quintaq
2001-03-23 21:17 ` Tim Moore
2001-03-21 14:06 ` Holger Lubitz
2001-03-19 20:32 ` Mark Hahn
2001-03-19 21:51 ` Tim Moore [this message]
2001-03-19 19:55 ` Jeremy Jackson
2001-03-19 20:38 ` Tim Moore
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