From owner-freebsd-questions@FreeBSD.ORG Sun Jul 22 03:10:15 2007 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D2B4216A417 for ; Sun, 22 Jul 2007 03:10:15 +0000 (UTC) (envelope-from freebsd@hub.org) Received: from hub.org (hub.org [200.46.204.220]) by mx1.freebsd.org (Postfix) with ESMTP id 6C29513C45E for ; Sun, 22 Jul 2007 03:10:15 +0000 (UTC) (envelope-from freebsd@hub.org) Received: from localhost (maia-3.hub.org [200.46.204.184]) by hub.org (Postfix) with ESMTP id 1956EB4681A; Sun, 22 Jul 2007 00:10:14 -0300 (ADT) Received: from hub.org ([200.46.204.220]) by localhost (mx1.hub.org [200.46.204.184]) (amavisd-maia, port 10024) with ESMTP id 40903-03; Sun, 22 Jul 2007 00:10:13 -0300 (ADT) Received: from fserv.hub.org (blk-89-241-126.eastlink.ca [24.89.241.126]) by hub.org (Postfix) with ESMTP id 4A9D1B46802; Sun, 22 Jul 2007 00:10:13 -0300 (ADT) Received: from [192.168.1.3] (unknown [192.168.1.3]) by fserv.hub.org (Postfix) with ESMTP id 64CC08D0F9; Sun, 22 Jul 2007 00:10:12 -0300 (ADT) Date: Sun, 22 Jul 2007 00:10:12 -0300 From: "Marc G. Fournier" To: Dan Nelson , Tim Daneliuk , freebsd-stable@freebsd.org Message-ID: <1431AA268771E71884A824C3@fserv.hub.org> In-Reply-To: <20070721165539.GA2579@dan.emsphone.com> References: <46A22253.8080100@tundraware.com> <20070721165539.GA2579@dan.emsphone.com> X-Mailer: Mulberry/4.0.8 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Cc: FreeBSD Mailing List Subject: Re: SATA 300 Drive Being Run At 150 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Jul 2007 03:10:15 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - --On Saturday, July 21, 2007 11:55:39 -0500 Dan Nelson wrote: > In the last episode (Jul 21), Tim Daneliuk said: >> I asked this question a while back, but needed to do more digging to make >> sure I had latest sources etc. >> >> I have an Intel motherboard that shows this for a SATA controller: >> >> atapci1: port >> 0x20c8-0x20cf,0x20ec-0x20ef,0x20c0-0x20c7,0x20e8-0x20eb,0x20a0-0x20af mem >> 0x90204000-0x902043ff irq 19 at device 31.2 on pci0 >> >> But the hard drive - a SATA 300 device - shows up like this: >> >> ad4: 238475MB at ata2-master SATA150 >> ^^^^^^^ >> Using dd, I have confirmed that the drive is running nowhere near >> SATA-III speeds, at least on reads: >> >> 968470075 bytes transferred in 7.132891 secs (135775249 bytes/sec) > > What was your dd commandline? If you've got more than 1GB of RAM and > tested by reading a file and not the raw device itself, you just tested > FreeBSD buffer cache. According to > http://www.wdc.com/en/products/productspecs.asp?driveid=135 , that > drive's maximum sustained speed is only 93.5 MB/sec, so it doesn't > really matter if your interface is running at SATA150 or SATA300 unless > you plan on reading exclusively from its 8MB buffer :) 'k, I just bought a new desktop, SATA/300MB/s interface, and this drive: Web site states 3Gb/s ... I'm seeing same SATA!50: atapci0: port 0xbf00-0xbf07,0xbe00-0xbe03,0xbd00-0xbd07,0xbc00-0xbc03,0xbb00-0xbb0f mem 0xfdbfe000-0xfdbfffff irq 16 at device 0.0 on pci2 atapci1: port 0xfa00-0xfa07,0xf900-0xf903,0xf800-0xf807,0xf700-0xf703,0xf600-0xf60f,0xf500-0xf50f irq 19 at device 31.2 on pci0 atapci2: port 0xf300-0xf307,0xf200-0xf203,0xf100-0xf107,0xf000-0xf003,0xef00-0xef0f,0xee00-0xee0f irq 19 at device 31.5 on pci0 ad8: 152627MB at ata4-master SATA150 Latest 6.x STABLE ... - ---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email . scrappy@hub.org MSN . scrappy@hub.org Yahoo . yscrappy Skype: hub.org ICQ . 7615664 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFGosqU4QvfyHIvDvMRAhENAKDhq0K+IDbZvD9Lcm51aLTwzjhz9ACgnFZz b3iDMLhANYWByT3a7Vu3utQ= =ZnlY -----END PGP SIGNATURE-----