linux-kernel - Re: HD head unloads

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Date:	Tue, 14 Nov 2006 13:06:58 -0500
From:	Mark Lord <lkml@....ca>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Pavel Machek <pavel@....cz>, Jeff Garzik <jeff@...zik.org>,
	Andi Kleen <ak@...e.de>, John Fremlin <not@...t.any.name>,
	kernel list <linux-kernel@...r.kernel.org>, htejun@...il.com,
	jim.kardach@...el.com
Subject: Re: HD head unloads

Jan Engelhardt wrote:
>
> Let me jump in here. Short info: Toshiba MK2003GAH 1.8" 20GB 
> PATA harddisk, in a Sony Vaio U3 (x86, gray-blue PhoenixBIOS).
> If idle for more than 5 secs, unloads. Even when not inside any OS, 
> which really sets me off.
>     So I wrote a quick workaround hack for Linux, http://tinyurl.com/y3qs6g
> It reads a predefined amount of bytes (just as much to not cause 
> slowdown yet still cause it to not unload) from the disk at fixed 
> intervals.

Thanks for the info.
Jan, in your specific case, can you not "fix it" properly with:

    hdparm -B255 /dev/?d?

(fill in your drive device there).

???
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