Date: Tue, 01 Nov 2005 11:44:16 -0800 From: "Kevin Oberman" <oberman@es.net> To: Nate Lawson <nate@root.org> Cc: freebsd-acpi@freebsd.org, Joe Holden <joe@joeholden.co.uk> Subject: Re: ACPI (?) Power management features - Query Message-ID: <20051101194416.1F23B5D07@ptavv.es.net> In-Reply-To: Your message of "Sun, 30 Oct 2005 22:49:04 PST." <4365BE60.9050405@root.org>
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> Date: Sun, 30 Oct 2005 22:49:04 -0800 > From: Nate Lawson <nate@root.org> > Sender: owner-freebsd-acpi@freebsd.org > > Joe Holden wrote: > > Firstly, Hello all! > > > > Does FreeBSD (5.x, 7) support power management features such as powering > > down the hard disks when they aren't in use, such as windows is able to do? > > > > If i 've missed something on the acpi www, or manual, feel free to > > abuse/flame/beat me with a stick. > > man atacontrol Feel free to point out that I am wrong, but I don't think atacontrol has the capability to do that at this time. You can detach a disk, but this will not power it down immediately. And it makes the disk disappear from the system which, if it's mounted, is likely to induce a crash. Matthew Dodd has a tool that does do this called atautil. Until atacontrol or something else grows support for powering a disk down, I think you will probably need it. You can Google for it or look in the mail archives. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634
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