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Date:      Mon, 22 Nov 2004 17:55:58 -0200
From:      =?ISO-8859-1?Q?Jo=E3o_Carlos_Mendes_Lu=EDs?= <jonny@jonny.eng.br>
To:        Charles Sprickman <spork@fasttrackmonkey.com>
Cc:        David Gilbert <dgilbert@dclg.ca>
Subject:   Re: List of fake vs. real SATA drives.
Message-ID:  <41A2444E.2090609@jonny.eng.br>
In-Reply-To: <Pine.OSX.4.61.0411221417120.787@oof.local>
References:  <16798.12075.465147.307112@canoe.dclg.ca> <864qjixdpi.wl%sf@FreeBSD.org> <41A1FB7D.9000308@jonny.eng.br> <Pine.OSX.4.61.0411221417120.787@oof.local>

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Charles Sprickman wrote:
> On Mon, 22 Nov 2004, [ISO-8859-1] João Carlos Mendes Luís wrote:
> 
>> What is the practical diference?  Performance?
> 
> 
> I don't know how much of it to believe, since it is marketing material, 
> but the Seagate white paper on their site claims that all the 
> command-queueing stuff brings the performance very close to that of scsi.

IIF they really have command queueing, I do believe.  So, a bridged SATA 
drive will not have command queuing, right?

Does FreeBSD already take advantage of this?  How could I check if my 
SATA drivers have command queueing or not?



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