Date: Mon, 26 Feb 2001 14:06:43 -0800 (PST) From: Stephen Rose <rose@rose.nu> To: Soren Schmidt <sos@freebsd.dk> Cc: freebsd-hackers@FreeBSD.ORG, Joe Gleason <clash@tasam.com> Subject: Re: ata-disk ioctl and atactl patch Message-ID: <Pine.BSF.4.05.10102261404590.73667-100000@k9.rose.nu> In-Reply-To: <200102262010.VAA29823@freebsd.dk>
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Well, for me it's the noise and heat that I'm trying to minimize. That
and we're out of power here in California. :-)
Steve Rose
On Mon, 26 Feb 2001, Soren Schmidt wrote:
> It seems Stephen Rose wrote:
> > A couple of us on the questions list have asked for a way to spin down ide
> > disks when idle. Is there any chance that this utility could lead to
> > something useful there?
>
> Well, of cause it could, but I'm not sure I see the usefullness of
> the spindown at all, a spinup costs several units of idleness power,
> so you have to keep it spun down for long periods to make it worth
> the effort, and you wear significantly more on the mechanics this
> way too...
>
> > It seems Scott Renfro wrote:
> > > As I promised on -mobile earlier this week, I've cleaned up my patches
> > > to port the {Net,Open}BSD atactl utility, including a simplistic
> > > ata-disk ioctl. They apply cleanly against this afternoon's -stable
> > > (including Soren's latest commit bringing -stable up to date with
> > > -current). I've been running them for some time and they ''work great
> > > here''.
> > >
> > > Before announcing this in a broader context, I wanted to get a bit of
> > > feedback on the ioctl implementation. In particular, is it safe to
> > > just do an ata_command inside adioctl() without any further checking?
> > > (e.g., can this cause bad things to happen under heavy i/o load?)
> >
> > No its not safe at all, you risk trashing an already running command...
> >
> > Anyhow, I have an atacontrol thingy in the works for attach/detach,
> > raid control etc, etc, I'll try to merge this functionality into that
> > (the ioctl's will change etc, but the functionality is nice)...
> >
> > -S?ren
> >
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> >
> > ---
> >
> >
> >
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> >
>
>
> -Søren
>
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