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Date: Wed, 18 Apr 2007 13:19:03 -0400
From: Mark Lord <liml@rtr.ca>
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To: Stephen.Clark@seclark.us
Cc: Tejun Heo <htejun@gmail.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
       7eggert@gmx.de, Chuck Ebbert <cebbert@redhat.com>,
       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>
Subject: Re: Loud "pop" coming from hard drive on reboot
References: <88SeR-5Sf-15@gated-at.bofh.it>	<88Sov-662-3@gated-at.bofh.it>	<88SHV-6uL-29@gated-at.bofh.it>	<8agVk-3wc-81@gated-at.bofh.it>	<8b3IR-4mE-25@gated-at.bofh.it>	<8b3SA-4z3-5@gated-at.bofh.it>	<8b42g-51N-15@gated-at.bofh.it>	<8bbdm-7iS-27@gated-at.bofh.it>	<E1He8dA-0000mw-LI@be1.lrz>	<46260981.1040109@gmail.com>	<20070418132904.3322ba5f@the-village.bc.nu>	<46261337.3010406@gmail.com>	<20070418140346.636879a1@the-village.bc.nu>	<46262C0E.9000103@rtr.ca> <20070418160627.7ab77c30@the-village.bc.nu> <46263650.3080705@rtr.ca> <46263859.2060309@gmail.com> <46265089.4000409@rtr.ca>
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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.

Cheers