From owner-freebsd-questions@FreeBSD.ORG Thu Mar 28 01:55:17 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by hub.freebsd.org (Postfix) with ESMTP id 28F6282C for ; Thu, 28 Mar 2013 01:55:17 +0000 (UTC) (envelope-from quartz@sneakertech.com) Received: from relay01.pair.com (relay01.pair.com [209.68.5.15]) by mx1.freebsd.org (Postfix) with SMTP id C36ACF8B for ; Thu, 28 Mar 2013 01:55:16 +0000 (UTC) Received: (qmail 21054 invoked by uid 0); 28 Mar 2013 01:55:10 -0000 Received: from 173.48.104.62 (HELO ?10.2.2.1?) (173.48.104.62) by relay01.pair.com with SMTP; 28 Mar 2013 01:55:10 -0000 X-pair-Authenticated: 173.48.104.62 Message-ID: <5153A2FD.8020804@sneakertech.com> Date: Wed, 27 Mar 2013 21:55:09 -0400 From: Quartz User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: "Ronald F. Guilmette" Subject: Re: Copying memstick image to a USB (flash/thumb) drive References: <6148.1364418621@server1.tristatelogic.com> In-Reply-To: <6148.1364418621@server1.tristatelogic.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Mar 2013 01:55:17 -0000 > Why exactly is the "bs=10240" is there? Wouldn't the default of 512 > do just as well? Modern systems can read and write far more than 512 bytes per operation. Sticking with 512 would work perfectly fine, but you'd be imposing an unnecessary bottleneck and the copy would be a lot slower overall. Whether 10K is optimal or not depends on the exact hardware you're messing with (it looks pretty low to me, I'd suggest more like 1M). ______________________________________ it has a certain smooth-brained appeal