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From: Jeremy Jackson <jerj@coplanar.net>
To: Tim Moore <timothymoore@bigfoot.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: UDMA 100 / PIIX4 question
Date: Mon, 19 Mar 2001 14:55:53 -0500	[thread overview]
Message-ID: <3AB66449.5F5C673F@coplanar.net> (raw)
In-Reply-To: <20010318165246Z131240-406+1417@vger.kernel.org> <3AB65C51.3DF150E5@bigfoot.com>

Tim Moore wrote:

> quintaq@yahoo.co.uk 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.  I achieve this when DMA is enabled, - without it I fall back to about 5 Mb /sec.  No amount of fiddling with other hdparm settings makes any difference.
> > ...
>
> 15MB/s for hdparm is about right.

You should be able to get about 30 MB/s at the start of the disk (zone 0) according to IBM's datasheet at

http://ssdweb01.storage.ibm.com/techsup/hddtech/prodspec/dtla_spw.pdf

so if you were testing say /dev/hda1 which is at the start of the disk it should be faster.

Try hdparm -i /dev/hda (or whatever) .. . note the reported MaxMultSect= value,
and put it in place of X in command:

hdparm -u 1 -d 1 -m X -c 1 /dev/hda

Cheers,

Jeremy

PS - please let me know if this fixed your problem, since I have a system
with the same motherboard.


  parent reply	other threads:[~2001-03-19 20:03 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
2001-03-19 19:55   ` Jeremy Jackson [this message]
2001-03-19 20:38     ` Tim Moore

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