linux-kernel - Re: Laptop shock detection and harddisk protection

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Message-ID: <48C82376.8020804@diamondcut.com.br>
Date:	Wed, 10 Sep 2008 16:43:50 -0300
From:	"Renato S. Yamane" <yamane@...mondcut.com.br>
To:	Tejun Heo <tj@...nel.org>
CC:	multinymous@...il.com, Elias Oltmanns <eo@...ensachen.de>,
	Thomas Renninger <trenn@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	IDE/ATA development list <linux-ide@...r.kernel.org>,
	roy@...ples.name
Subject: Re: Laptop shock detection and harddisk protection

Tejun Heo escreveu:
> I browsed a little bit for HDAPS one and it seems all the pieces are
> there but scattered.  The latest effort seems tp_smapi which Shem
> Multinymous is working on.

I have a Lenovo Thinkpad T61 running tp_smapi and hdapsd over 2.6.26.2
Kernel with Elias patch:
<http://article.gmane.org/gmane.linux.drivers.hdaps.devel/1324/raw>

If you need some info, pls let me know.

> 1. How should the shock interface look like?  As we're gonna need
>    userland daemon one way or the other, we can use the userland
>    daemon to glue all the interfaces but it would be much better to
>    have a unified interface.  Although there seem to be several
>    different variants, they don't differ all that much and creating a
>    new interface every time is painful.  I think we can get by with a
>    sysfs interface with notification.

IMHO, userland daemon need only inform users when hdd heads was parking.
This is what KHDAPSMonitor do (<http://roy.marples.name/node/269>).
A daemon like this is used in Windows, but one more feature is present:
Is possible choose "Manual Unlock" (hdd heads is kept parked until I
click over daemon to unlock).

Best regards,
Renato S. Yamane
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