linux-kernel - Re: Loud "pop" coming from hard drive on reboot

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Date:	Thu, 19 Apr 2007 08:59:05 -0400
From:	Stephen Clark <Stephen.Clark@...lark.us>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, Tejun Heo <htejun@...il.com>,
	7eggert@....de, Chuck Ebbert <cebbert@...hat.com>,
	emisca <emisca.ml@...il.com>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org, Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...l.org>
Subject: Re: Loud "pop" coming from hard drive on reboot

Jan Engelhardt wrote:

>On Apr 18 2007 09:39, Stephen Clark wrote:
>  
>
>>So this is the pop I hear on my new laptop that is using
>>libata=combined_mode when I shut my system down. I didn't get the
>>pop with the same disk drive in an older laptop that was only ide.
>>It sounds like a relay closing or opening, but is really my drive
>>head doing an emergency retract/park?
>>    
>>
>
>Most(?) disks' heads are spring-/power-based so that whenever
>they lose power, the spring retracts the head back to the park zone.
>
>Whether it is the disk head or something else.. take out the disk,
>and retry. Might not be that easy with laptops, though.
>
>
>Jan
>  
>
It is definitely the disk drive. It is located in the right front corner 
of my laptop so I put my ear
by it during shutdown and that is where the click is coming from. As I 
said before I had this same
drive in another laptop that was strictly ide so it used the older ide 
driver and it never did this.

Steve

-- 

"They that give up essential liberty to obtain temporary safety, 
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty 
decreases."  (Thomas Jefferson)



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