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Date:      Thu, 18 Jun 2009 15:27:40 +0200
From:      Alexander Leidinger <Alexander@Leidinger.net>
To:        Alexander Motin <mav@FreeBSD.org>
Cc:        svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org
Subject:   Re: svn commit: r191674 - in head/sys/dev/ata: . chipsets
Message-ID:  <20090618152740.1806764x8heftjv0@webmail.leidinger.net>
In-Reply-To: <4A38EB41.2080206@FreeBSD.org>
References:  <200904292117.n3TLHIpt093110@svn.freebsd.org> <20090617150015.18455ggwluk5bcgs@webmail.leidinger.net> <4A38EB41.2080206@FreeBSD.org>

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Quoting Alexander Motin <mav@FreeBSD.org> (from Wed, 17 Jun 2009  
16:10:25 +0300):

> Alexander Leidinger wrote:
>> Quoting Alexander Motin <mav@FreeBSD.org> (from Wed, 29 Apr 2009
>> 21:17:18 +0000 (UTC)):

>>>   PARTIAL state has up to 100us (50us for me) wakeup latency, but for my
>>>   ICH8M saves 0.5W of power per drive. SLUMBER state has up to 10ms
>>> (3.5ms
>>>   for me) wakeup latency, but saves 0.8W of power.
>>>
>>>   Modes 2 and 3 are implemented only for AHCI driver now.
>>
>> Does this mean it is for SATA devices only, or is this a feature of the
>> complete controller (ICH5 in my case) and also works with PATA drives?
>
> This feature is SATA-specific by definition. AFAIK there is no bus power
> management in PATA.

What happens if such a setting is made for a pata channel, will the  
system ignore it? The idea of the question is: can I just add those  
hints for all my ata channels on a remote system without getting into  
trouble?

Bye,
Alexander.

-- 
While you're chewing, think of STEVEN SPIELBERG'S bank account ...  his
will have the same effect as two "STARCH BLOCKERS"!

http://www.Leidinger.net    Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org       netchild @ FreeBSD.org  : PGP ID = 72077137



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