From owner-freebsd-performance@FreeBSD.ORG Sun Oct 2 18:25:37 2005 Return-Path: X-Original-To: freebsd-performance@freebsd.org Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 61DCD16A41F for ; Sun, 2 Oct 2005 18:25:37 +0000 (GMT) (envelope-from killing@multiplay.co.uk) Received: from multiplay.co.uk (core6.multiplay.co.uk [85.236.96.23]) by mx1.FreeBSD.org (Postfix) with ESMTP id AC5D943D49 for ; Sun, 2 Oct 2005 18:25:36 +0000 (GMT) (envelope-from killing@multiplay.co.uk) Received: from vader ([212.135.219.179]) by multiplay.co.uk (multiplay.co.uk [85.236.96.23]) (MDaemon.PRO.v8.1.3.R) with ESMTP id md50001870022.msg for ; Sun, 02 Oct 2005 19:25:30 +0100 Message-ID: <004701c5c77e$a8ab4310$b3db87d4@multiplay.co.uk> From: "Steven Hartland" To: =?iso-8859-1?Q?Arne_W=F6rner?= , "Patrick Proniewski" References: <20051002170446.78674.qmail@web30303.mail.mud.yahoo.com> Date: Sun, 2 Oct 2005 19:25:20 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2670 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 X-Spam-Processed: multiplay.co.uk, Sun, 02 Oct 2005 19:25:30 +0100 (not processed: message from valid local sender) X-MDRemoteIP: 212.135.219.179 X-Return-Path: killing@multiplay.co.uk X-MDaemon-Deliver-To: freebsd-performance@freebsd.org X-MDAV-Processed: multiplay.co.uk, Sun, 02 Oct 2005 19:25:31 +0100 Cc: freebsd-performance@freebsd.org Subject: Re: dd(1) performance when copiing a disk to another X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 02 Oct 2005 18:25:37 -0000 ----- Original Message ----- From: "Arne Wörner" > That seems to be 2 or about 2 times faster than disc->disc > transfer... But still slower, than I would have expected... > SATA150 sounds like the drive can do 150MB/sec... LOL, you might want to read up on what SATA150 means. In short it the max throughput the interface can sustain. It is NOT what you can get of a single disk which is still fare from that, SATA disk transfer rates typically 30 -> 50MB/s sustained. Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone (023) 8024 3137 or return the E.mail to postmaster@multiplay.co.uk.