linux-kernel - Re: Stardom SATA HSM violation

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Date:	Fri, 07 Sep 2007 09:58:59 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Mark Lord <liml@....ca>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	michal.k.k.piotrowski@...il.com, bryan@...ores.ca,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: Stardom SATA HSM violation

Hello,

Mark Lord wrote:
> I reported a very similar bug back a few releases ago.
> Anyone who wants to try it themselves, can do this with hdparm-7.7 (from
> sourceforge):
> 
>    hdparm --drq-hsm-error /dev/sda
> 
> Whether or not it hangs the machine does depend upon exactly which SATA
> LLD is used,
> and what model/revision of drive is installed.  But if it hangs for you
> (eg. Tejun),
> then you now have a way to reproduce a HSM error "on demand" for
> testing.  :)

Neat.  Is this the FIFO-draining issue?

Thanks.

-- 
tejun
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