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

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Date:	Fri, 20 Apr 2007 21:57:56 +0200
From:	"Fabio Comolli" <fabio.comolli@...il.com>
To:	"Chuck Ebbert" <cebbert@...hat.com>
Cc:	Stephen.Clark@...lark.us, "Mark Lord" <liml@....ca>,
	"Tejun Heo" <htejun@...il.com>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>, 7eggert@....de,
	emisca <emisca.ml@...il.com>,
	"Jan Engelhardt" <jengelh@...ux01.gwdg.de>,
	"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

Bingo!
I switched from ata_piix.c to piix_ide.c and the "pop" disappeared.

I must say that the "pop" also disappeared after suspending to disk
using suspend2 (obviously without executing halt -n -h -p) . In both
cases it was present with the previous setup.

This is with a pure PATA setup with no SATA ports and the disk is:

hda: TOSHIBA MK8025GAS, ATA DISK drive

Many thanks!
regards,
Fabio




On 4/19/07, Chuck Ebbert <cebbert@...hat.com> wrote:
> 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.
>
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