From owner-freebsd-questions@freebsd.org Sun Sep 27 00:51:06 2015 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 16F539CF670 for ; Sun, 27 Sep 2015 00:51:06 +0000 (UTC) (envelope-from quartz@sneakertech.com) Received: from douhisi.pair.com (douhisi.pair.com [209.68.5.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id E8959AD4 for ; Sun, 27 Sep 2015 00:51:05 +0000 (UTC) (envelope-from quartz@sneakertech.com) Received: from [10.2.2.1] (pool-173-48-121-235.bstnma.fios.verizon.net [173.48.121.235]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by douhisi.pair.com (Postfix) with ESMTPSA id C082D3F738 for ; Sat, 26 Sep 2015 20:50:57 -0400 (EDT) Message-ID: <56073D71.5060404@sneakertech.com> Date: Sat, 26 Sep 2015 20:50:57 -0400 From: Quartz MIME-Version: 1.0 To: freebsd-questions@freebsd.org Subject: Re: dd question References: <5606A4FF.4090105@hiwaay.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 27 Sep 2015 00:51:06 -0000 > Well first off I'd tell dd to use a bigger bs like 1m. I'll second this. I think the default for mos *nixs is 512 byte blocks, which is painfully slow. You need to manually specify bs=1M. It's also possibly the stick is just dying, but try the blocksize first.