From owner-freebsd-hackers@FreeBSD.ORG Mon Nov 22 22:44:26 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1063416A4CE for ; Mon, 22 Nov 2004 22:44:26 +0000 (GMT) Received: from spider.deepcore.dk (cpe.atm2-0-53484.0x50a6c9a6.abnxx9.customer.tele.dk [80.166.201.166]) by mx1.FreeBSD.org (Postfix) with ESMTP id 5699F43D5C for ; Mon, 22 Nov 2004 22:44:25 +0000 (GMT) (envelope-from sos@DeepCore.dk) Received: from [194.192.25.143] (laptop.deepcore.dk [194.192.25.143]) by spider.deepcore.dk (8.12.11/8.12.10) with ESMTP id iAMMiLCw070938; Mon, 22 Nov 2004 23:44:23 +0100 (CET) (envelope-from sos@DeepCore.dk) Message-ID: <41A26BC0.3030803@DeepCore.dk> Date: Mon, 22 Nov 2004 23:44:16 +0100 From: =?ISO-8859-1?Q?S=F8ren_Schmidt?= User-Agent: Mozilla Thunderbird 0.7.2 (X11/20040802) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Stephen Montgomery-Smith References: <20041122215408.gjzs36hxmsoo00@.mailhost.wsf.at> <41A25860.8030901@math.missouri.edu> In-Reply-To: <41A25860.8030901@math.missouri.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-mail-scanned: by DeepCore Virus & Spam killer v1.4 cc: tw@wsf.at cc: freebsd-hackers@freebsd.org Subject: Re: List of fake vs. real SATA drives. X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Nov 2004 22:44:26 -0000 Stephen Montgomery-Smith wrote: > Thomas Wolf wrote: >=20 >> Stephen Montgomery-Smith schrieb: >> >>> FUJISHIMA Satsuki wrote: >>> >>>> Currently native SATA drives are still not so popular. There are: >>> >>>> Seagate Barracuda ATA V, 7200.7, 7200.8 >>> >>> I have one of these, and I am really impressed by its performance. I= =20 >>> added one to my computer, which came with a Maxtor 6Y080L0. My main = >>> disk intensive operation is creating the CTM deltas (as in CTM which = >>> is an alternative to CVSUP for people behind unfriendly firewalls). = >>> The performance difference was somewhat collosal, as in something=20 >>> like 3 times faster. To be honest, I am still at a loss to explain=20 >>> why the Seagate did so very much better - maybe it is the 8M cache as= =20 >>> compared to the 2M cache. The Seagate 7200.7 had similar performance= =20 >>> to a Seagate 160MHz SCSI drive that I have on another computer. >> >> Ah, please tell me more about it, is this a ST3120827AS? >> (I would need the exact PartNo.) What controller dou you have and=20 >> finally, on which version of FreeBSD? >> > ST380013AS with Intel ICH5 SATA150 controller and FreeBSD 4.10-Stable. = > The kernel reports that it is running at UDMA33, but the actual=20 > performance seems much better than that. Hold on right there, the ST380013AS is a Barracuda V 7200.7 device and=20 does not do any form of tagging, neither does the ICH5 support it. You=20 are just enjoying the stock speed of modern (S)ATA gear :) Oh, and 4.x has no notion of SATA it only works on controllers that can=20 emulate the old ATA way of things. This is means that the ATA33 speed=20 isn't whats used as SATA v1 always runs at 150MB/s, just 4.x has no way=20 of telling. --=20 -S=F8ren