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From: Richard Johnson <raj@cisco.com>
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Date: Sat, 24 Feb 2001 17:25:22 -0800
To: Scott Renfro <scott@renfro.org>
Cc: mobile@FreeBSD.ORG
Subject: Re: Any ideas on keeping the disk spun down on laptop
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Scott Renfro writes:
 > Tired of the same issue, I threw together a rough ata-disk ioctl
 > implementation against -stable. Also ported the OpenBSD atactl,
 > pairing it down to only handle the idle, standby, setidle, and
 > setstandby commands.  (The other commands were identify, sleep,
 > and checkpower.)
 > 
 > It's in a ''works here'' state.  For better or worse, my ioctl
 > code is *much* simpler than the [Net|Open]BSD versions, which may
 > imply that it won't handle the special cases as well.
 > 
 > If there's interest, I can clean it up a bit and put it up for
 > review this weekend.

I, for one, would love to see this type of code in the standard
FreeBSD distribution.  I know some people have argued that spinning
the disk down doesn't save that much power since it takes more to get
it back up and running again than it does to just keep it running.  I
think some of us, however, are simply looking for a peace and quiet
when there's basically no reason to have the drive running.  It
certainly wouldn't hurt to make the code available, regardless of what 
viewpoint a person may take.

Thanks for going to all of the work to do the ioctl!  I would have
done it myself but I'm just too busy with real work these days.

/raj

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