linux-kernel - Re: libata - anomaly performance with NCQ

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Message-ID: <4983A446.5080809@shaw.ca>
Date:	Fri, 30 Jan 2009 19:07:18 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Bartosz SKOWRON <getxsick@...il.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: libata - anomaly performance with NCQ

Bartosz SKOWRON wrote:
> Hi,
> 
> here is a problem:
> http://ata.wiki.kernel.org/index.php/Known_issues#Seagate_harddrive_performance_anomaly_with_hdparm
> 
> and my disk is affected by this one as well.
> it's ST9320421AS and you can add it to the list
> 
> And 2 questions:
> 1) cause the title contains "with hdparm"...does it mean that
> physically the performance is OK and only hdparm shows something
> wrong?

Well, hdparm is a fairly crude benchmark but there's likely at least 
some impact in other usage.

> 2) there is an information about upgrading firmware. as far as i know
> Seagate doesn't publish firmwares. So the only way is to contact
> seagate support, send the hdd and wait for the new one?

I think Seagate can provide firmware updaters for the user to use, but 
normally only if you contact support I think.
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