From: Konstantin Sobolev <kos@supportwizard.com>
Reply-To: kos@supportwizard.com
Organization: SupportWizard
To: Lenar =?iso-8859-1?q?L=F5hmus?= <lenar@vision.ee>
Subject: Re: poor sata performance on 2.6
Date: Thu, 15 Apr 2004 14:40:23 +0400
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Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org
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On Thursday 15 April 2004 11:12, Lenar L?hmus wrote:
> >for sata_sil:
> >
> >/dev/sda:
> > Timing buffer-cache reads:   1412 MB in  2.00 seconds = 705.05 MB/sec
> > Timing buffered disk reads:   84 MB in  3.06 seconds =  27.43 MB/sec
> >
> >So my old IDE HDD appears to be considerably faster. Expected results were
> >55-70MB/s.
>
> With same hard drive connected to 3ware S-ATA controller I got
> 40-50MB/sec with hdparm on 2.6.4 and 2.6.5. Then
> tried to hdparm -a 8192 /dev/sda, and got this:
>
> /dev/sda:
>  Timing buffer-cache reads:   2056 MB in  2.00 seconds = 1027.13 MB/sec
>  Timing buffered disk reads:  266 MB in  3.00 seconds =  88.53 MB/sec
>
> So you may try that switch, maybe helps.

unfortunately it doesn't:

/dev/sda:
 setting fs readahead to 8192
 readahead    = 8192 (on)
 Timing buffered disk reads:   84 MB in  3.06 seconds =  27.46 MB/sec
-- 
/KoS
* Searching for light in the darkness of insanity.		      
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