Date: Thu, 03 Jan 2008 20:56:31 -0600
From: Robert Hancock <hancockr@shaw.ca>
Subject: Re: SATA kernel-buffered read VERY slow (not raid,
 Promise TX300 card); 2.6.23.1(vanilla)
In-reply-to: <477D9D66.3080502@tlinx.org>
To: Linda Walsh <lkml@tlinx.org>
Cc: LKML <linux-kernel@vger.kernel.org>, linux-ide@vger.kernel.org
Message-id: <477DA05F.4080503@shaw.ca>
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References: <fa.o9uy6Qaq3PtHs2Z9lAKGUKvD85I@ifi.uio.no>
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 <fa.iefWPg3R6g5Pnm/ktSCK9XWVFVw@ifi.uio.no>
 <fa.FhpaleM/osLTMJ85/PuxjxyJeGI@ifi.uio.no>
 <fa.MP5rgMp4TS2+Cfemd/uFOQOuquQ@ifi.uio.no> <477D9B6E.7060000@shaw.ca>
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Linda Walsh wrote:
> Robert Hancock wrote:
>>
>> Looks like the drive reports ERR/ABRT (command aborted), meaning it 
>> likely doesn't support those commands.
>>
> ---
>    Except the PATA version of the drive does (same capacity, & other 
> specs).  Seagate would
> disable "advanced" features for SATA but leave them for the older 
> technology?  Possible,
> but doesn't seem likely.

If this is a Seagate, I believe that they don't have AAM enabled on any 
of their newer drives (something about a lawsuit for patent infringement 
on that feature, or something). Quite likely they don't support that 
power management command, either.
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