Summary: Re: Spin down HDD after disk sync or before power off

Alexander Motin mav at
Tue Nov 16 23:23:53 UTC 2010

Alexander Best wrote:
> On Tue Nov 16 10, Bruce Cran wrote:
>> On Fri, 22 Oct 2010 10:03:09 +0000
>> Alexander Best <arundel at> wrote:
>>> so how about olivers patch? it will only apply to ata devices so it's
>>> garanteed not to break any other CAM devices (i'm thinking about the
>>> aac controller issue). you could revert your previous shutdown work
>>> and plug olivers patch into CAM. you might want to replace the
>>> combination of flush/standby immediate with sleep.
>> One problem with the code that's been committed is that the shutdown
>> event handler doesn't get run during a suspend operation so an
>> emergency unload still gets done when running "acpiconf -s3".
> unfortunately i don't think a can help you on that one. acpi never worked for
> me! even 'acpiconf -s1' will hopelessly crash my system. :(

It is not necessary to have fully working suspend to work on this.
Bounce mode should be enough. If bounce is also not working for you - it
definitely should be the first thing to fix.

>From the other side ATM I see no good approach to this, as soon as CAM
devices are not present on NewBus to handle suspend events. Unless SIM
drivers will expose those events to CAM in some way.

Alexander Motin

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