Date: Sun, 02 Dec 2007 16:27:52 -0800 From: "Kevin Oberman" <oberman@es.net> To: Nate Lawson <nate@root.org> Cc: freebsd-acpi@freebsd.org Subject: Re: Power savings on USB Hard drives Message-ID: <20071203002752.ADB184500E@ptavv.es.net> In-Reply-To: Your message of "Sun, 02 Dec 2007 16:15:05 PST." <47534A89.3010403@root.org>
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--==_Exmh_1196641672_62821P Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > Date: Sun, 02 Dec 2007 16:15:05 -0800 > From: Nate Lawson <nate@root.org> > Sender: owner-freebsd-acpi@freebsd.org > > Laurent LEVIER wrote: > > Hi Guys, > > > > I am using FreeBSD 6.2, soon 7.0 over a server and a laptop. > > > > I would like, on both configurations, to be able to have hard drive > > power savings as on internal IDE drives. > > > > At the moment, my external USB2 drive, when mounted but even not > > adresses, keeps running permanently despite it is just mounted for > > backups (no access out of backup times on sunday then). > > > > I digged on mailing lists, but cant find why the HD keep running. > > > > Can someone help? > > > > Thanks in advance > > > > Brgrds > > This is outside the realm of acpi. Have you tried the ataidle ported > application? It works for most internal drives but I'm not sure how it > would do over USB. Almost all external USB drives use umass and are not handled as ATA but as SCSI. As such, camcontrol is the tool that should probably be used, but I have no such devices and I don't know what the appropriate command might be. Asking on usb@ might provide the needed information. -- 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 Key fingerprint:059B 2DDF 031C 9BA3 14A4 EADA 927D EBB3 987B 3751 --==_Exmh_1196641672_62821P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) Comment: Exmh version 2.5 06/03/2002 iD8DBQFHU02Ikn3rs5h7N1ERAsdQAJ955HeEa2KcZYUoT6N0qAyC1xU4HwCghm1p 75WGq2kU2tNGdoAKhc9ESpI= =CJb0 -----END PGP SIGNATURE----- --==_Exmh_1196641672_62821P--
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