From owner-freebsd-questions@FreeBSD.ORG Sun Jun 7 18:57:05 2009 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 111AF106566C for ; Sun, 7 Jun 2009 18:57:05 +0000 (UTC) (envelope-from gfritz@gmail.com) Received: from wf-out-1314.google.com (wf-out-1314.google.com [209.85.200.172]) by mx1.freebsd.org (Postfix) with ESMTP id D02AF8FC16 for ; Sun, 7 Jun 2009 18:57:04 +0000 (UTC) (envelope-from gfritz@gmail.com) Received: by wf-out-1314.google.com with SMTP id 24so979486wfg.7 for ; Sun, 07 Jun 2009 11:57:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:received:date:from:to:cc :subject:message-id:references:mime-version:content-type :content-disposition:in-reply-to:user-agent; bh=6DjRHDKXr1HDXWqs+7k1XJBKXQQgbgJkyMM0/rVBPPo=; b=nHO8Chp35hfPT22UUxEyzVhUZMO6Nyzkd0oxkFH72jVNvOjCQXMnjbO37z1HBfvxWa kCKBVUY3zmzp6UmvzA6mS6yzCiOKB/aYAMLWXyCtToAM8byRjYKOn2oi612vnetypd+4 PrhT733LRFy7SDutYEF6m9ve2TMHfNSdXL4M8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=LrbC77WS9FBwYUNBYIpT2GPzawd32pnZHSlw+ErUUyJkt3vh9jqzq2xTeXai11GU4V Ie6pgl0O+6BOOx7uJzVcH92zz5VwiP9/s8nSlSj3UFfFBmW4QW3vP0eOtRLoIRIMGma4 DITPvD/o/vfiEKEqHgFzyd83pS8Eozgx4wDss= Received: by 10.143.42.6 with SMTP id u6mr1919082wfj.149.1244401024585; Sun, 07 Jun 2009 11:57:04 -0700 (PDT) Received: from dev.null (63-12-66-208.dsl.cust.wirelessbeehive.com [208.66.12.63]) by mx.google.com with ESMTPS id 30sm6810208wfa.35.2009.06.07.11.57.03 (version=TLSv1/SSLv3 cipher=RC4-MD5); Sun, 07 Jun 2009 11:57:04 -0700 (PDT) Received: by dev.null (Postfix, from userid 1001) id 9115741; Sun, 7 Jun 2009 12:57:02 -0600 (MDT) Date: Sun, 7 Jun 2009 12:57:02 -0600 From: Geoff Fritz To: Wojciech Puchar Message-ID: <20090607185702.GA28486@dev.null> References: <20090607165504.GA67823@dev.null> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.19 (2009-01-05) Cc: "John ." , Geoff Fritz , freebsd-questions@freebsd.org Subject: Re: please recommend a disk-exercising program? 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, 07 Jun 2009 18:57:05 -0000 On Sun, Jun 07, 2009 at 07:49:41PM +0200, Wojciech Puchar wrote: > > > > I've seen several mentions of "dd" in this thread, and I'll say that I've > > seen several recommendations elsewhere to use a simple: > > > > dd if=/dev/ of=/dev/ > > forgot bs=1m or at least 64kB, unless you like to wait days with default > bs=512 Such things should be understood, more or less. I didn't want to confuse the issue with extra options. But you are correct. These options will greatly speed up the process for dd. It's not like the badblocks command is particularly speedy, either. I imagine that *any* thorough drive test would take a long while given today's typical drive size. -- Geoff