From owner-freebsd-current@FreeBSD.ORG Tue Nov 6 15:59:02 2007 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7EF2216A41A for ; Tue, 6 Nov 2007 15:59:02 +0000 (UTC) (envelope-from scottl@samsco.org) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.freebsd.org (Postfix) with ESMTP id 10E7B13C49D for ; Tue, 6 Nov 2007 15:59:01 +0000 (UTC) (envelope-from scottl@samsco.org) Received: from phobos.samsco.home (phobos.samsco.home [192.168.254.11]) (authenticated bits=0) by pooker.samsco.org (8.13.8/8.13.8) with ESMTP id lA6FvMxZ063071; Tue, 6 Nov 2007 08:57:23 -0700 (MST) (envelope-from scottl@samsco.org) Message-ID: <47308EE0.70600@samsco.org> Date: Tue, 06 Nov 2007 08:57:20 -0700 From: Scott Long User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.6) Gecko/20070802 SeaMonkey/1.1.4 MIME-Version: 1.0 To: =?windows-1252?Q?=3F=3F=3F_Bill_Hacker?= References: <472EB211.7050001@delphij.net> <472EEADF.1000008@gmail.com> <472F466E.8050405@delphij.net> <472F5846.1020304@gmail.com> <472F5D9A.9050900@delphij.net> <472FCC15.9040903@gmail.com> <472FD0FB.9090608@delphij.net> <473001E7.2090201@yandex.ru> <473017DF.7070105@gmail.com> <62151.71.164.232.42.1194356793.squirrel@mail.ringofsaturn.com> <20071106144749.GA91218@eos.sc1.parodius.com> <47525.209.159.98.1.1194362930.squirrel@mail.ringofsaturn.com> <47308AFB.9090000@conducive.net> In-Reply-To: <47308AFB.9090000@conducive.net> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-2.0.2 (pooker.samsco.org [168.103.85.57]); Tue, 06 Nov 2007 08:57:23 -0700 (MST) X-Spam-Status: No, score=-1.4 required=5.5 tests=ALL_TRUSTED autolearn=failed version=3.1.8 X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on pooker.samsco.org Cc: freebsd-current@freebsd.org Subject: Re: [ANNOUNCEMENT] Wiki for discussing P35/IHC9(R)/SATA issues set up X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Nov 2007 15:59:02 -0000 ??? Bill Hacker wrote: > Rusty Nejdl wrote: >>> Does SATA300, but has the same "feature" as the OP's Seagate drive: >>> a small jumper that limits the drive to SATA150 unless removed. >>> See below PDF. >>> >>> http://www.seagate.com/ww/v/index.jsp?vgnextoid=e2af99f4fa74c010VgnVCM100000dd04090aRCRD&locale=en-US >>> >>> http://www.seagate.com/staticfiles/support/disc/manuals/desktop/Barracuda%207200.10/100402371h.pdf >>> >>> >> >> Jeremy, >> >> Thanks! Like Aryeh, I missed the jumper. I'll test this out tonight >> when >> I get home. >> >> Rusty >> > BTW - in a recent test of 2.5" high-capacity HDD, it was noted that SATA > required significantly more power than PATA. Well 'significant' to a > laptop on battery, anyway. > Yes, this is because the SATA physical interface is always transmitting a signal, i.e. it has 100% duty cycle, whereas PATA tri-states when it's not active and typically has a 10-20% duty cycle even when active. It's a well understood issue in the SATA world, and drives and controllers are starting to appear on the market that address it. > Given that single-drive setups seldom stress even UDMA 133 over the > course of reasonable time spans, does anyone know if: > > A) SATA 300 needs yet-again more power than SATA 150? Yes, it's a higher frequency so it draws more power. > > B) running down-shifted to SATA 150 might actually be a better plan > anyway in some circumstances? A little better, but still not as good as being able to put the signal to an idle state. Scott