From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chuck Ebbert <cebbert@redhat.com>
Subject: Re: Loud "pop" coming from hard drive on reboot
Date: Thu, 19 Apr 2007 13:50:33 -0400
Message-ID: <4627ABE9.8090906@redhat.com>
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To: Stephen.Clark@seclark.us
Cc: Mark Lord <liml@rtr.ca>, Tejun Heo <htejun@gmail.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>, 7eggert@gmx.de, emisca <emisca.ml@gmail.com>, Jan Engelhardt <jengelh@linux01.gwdg.de>, Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>, linux-kernel <linux-kernel@vger.kernel.org>, linux-ide@vger.kernel.org, Adrian Bunk <bunk@stusta.de>, Andrew Morton <akpm@osdl.org>

Stephen Clark wrote:
> Mark Lord wrote:
> 
>> Mark Lord wrote:
>>  
>>
>>> With the patch applied, I don't see *any* new activity in those
>>> S.M.A.R.T.
>>> attributes over multiple hibernates (Linux "suspend-to-disk").
>>>   
>>
>> Scratch that -- operator failure.  ;)
>> The patch makes no difference over hibernates in the SMART logs.
>>
>> It's still logging extra Power-Off_Retract_Count pegs,
>> which it DID NOT USED TO DO not so long ago.
>>
>> Now I'll poke at the shutdown again.
>>
>> Meanwhile, Stephen:  Could you try without this line in the patched file:
>>
>>        case ATA_16:
>> +               dev->needs_sync_cache = 1;
>>
>> Ie. comment out that last "dev->needs_sync_cache" line.
>>
>>
> No joy - even with that line commented out I get a click and my
> Power-Off_Retract_Count has incremented.
> 

I found a solution of sorts on Fedora 6:


Edit /etc/rc0.d/S01halt, changing the third-from-last line so it reads:

HALTARGS="-d -h -n"

Then use the halt(8) command to shut down and turn off the power manually.
No click and the "retract" counter does not increment. (Even this procedure
incremented the counter until I changed the script.)

Seems safe, using the IDE drivers, since they sync the cache anyway.