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Date: Mon, 14 Apr 2003 02:21:53 -0700
From: David Schultz <das@FreeBSD.ORG>
To: Soeren Schmidt <sos@spider.deepcore.dk>
Message-ID: <20030414092153.GA18110@HAL9000.homeunix.com>
Mail-Followup-To: Soeren Schmidt <sos@spider.deepcore.dk>,
	"Cliff L. Biffle" <cbiffle@safety.net>, current@freebsd.org
References: <200304111707.39370.cbiffle@safety.net>
	<200304130956.h3D9uaf6025414@spider.deepcore.dk>
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cc: current@FreeBSD.ORG
Subject: Re: [PATCH] ATA drive spin-down
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On Sun, Apr 13, 2003, Soeren Schmidt wrote:
> It seems Cliff L. Biffle wrote:
> > Please find attached a kernel patch to enable ATA drive spin-down after a 
> > specified interval.  I'm using this on my laptop now with much success; I'm 
> > offering it primarily for testing purposes.  I'll toss it onto mobile if it 
> > seems okay.
> 
> Hmm, this could be a fine intermediate solution until I get the 
> infrastructure for real PM / SMART finished. I'll look this over and
> get it committed. One thing though the name ata_suspend is a bit
> off IMHO, something like ata_spindown/ata_standby would be more
> descriptive I think.

IMO, a more flexible scheme would be to send a ``suspend
immediate'' command to the drive at the appropriate time,
rather than having it time out all by itself.  The definition
of ``the appropriate time'' could be related to ACPI, values
of sysctls, or something user-definable.  But this patch is
cool, too.