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

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Message-ID: <41840b750809171236s524f1a70i3e1624a2facd9d44@mail.gmail.com>
Date:	Wed, 17 Sep 2008 15:36:36 -0400
From:	"Shem Multinymous" <multinymous@...il.com>
To:	"Elias Oltmanns" <eo@...ensachen.de>
Cc:	"Pavel Machek" <pavel@...e.cz>, "Tejun Heo" <tj@...nel.org>,
	"Thomas Renninger" <trenn@...e.de>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"IDE/ATA development list" <linux-ide@...r.kernel.org>
Subject: Re: Laptop shock detection and harddisk protection

On Wed, Sep 17, 2008 at 11:21 AM, Elias Oltmanns <eo@...ensachen.de> wrote:
>>> 2. Make shock protection interact nicely with suspend operations:
>>>    currently, we are out of luck if anything should happen after
>>>    processes have been frozen. This is particularly unfortunatel in the
>>>    case of s2disk.
>>
>> I'd say that s2disk is similar to early boot... no protection there.
>
> Well, this is true for resume. However, I can't help thinking that we
> may do better than that until the disk spins down, particularly while
> writing the image to disk.

Agreed.
Practically, disk protection during suspend-to-disk sounds very
useful, given the typical usage scenario: you press button to
hibernate and start shuffling around your chair/desk in preparation
for leaving the room. Dropping the laptop is more likely than ever at
this point. Resume-from-disk tends to be done after settling down into
your chair/desk, so the drop risk is lower.

  Shem
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