From owner-freebsd-questions@FreeBSD.ORG Fri Feb 28 03:31:43 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 733F34D1 for ; Fri, 28 Feb 2014 03:31:43 +0000 (UTC) Received: from mx02.qsc.de (mx02.qsc.de [213.148.130.14]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 34FBC1821 for ; Fri, 28 Feb 2014 03:31:42 +0000 (UTC) Received: from r56.edvax.de (port-92-195-11-141.dynamic.qsc.de [92.195.11.141]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx02.qsc.de (Postfix) with ESMTPS id 4EB6E2789D; Fri, 28 Feb 2014 04:31:41 +0100 (CET) Received: from r56.edvax.de (localhost [127.0.0.1]) by r56.edvax.de (8.14.5/8.14.5) with SMTP id s1S3VHux002459; Fri, 28 Feb 2014 04:31:17 +0100 (CET) (envelope-from freebsd@edvax.de) Date: Fri, 28 Feb 2014 04:31:17 +0100 From: Polytropon To: Matthias Apitz Subject: Re: errors from external USB disk Message-Id: <20140228043117.de68f92e.freebsd@edvax.de> In-Reply-To: <20140227183248.GA3339@La-Habana> References: <20140226121714.GA1532@tiny-r255948> <20140226145527.3cd8eb4b.freebsd@edvax.de> <20140227115934.GA2006@La-Habana> <20140227150715.e6aa0594.freebsd@edvax.de> <20140227175258.GA3214@La-Habana> <20140227183248.GA3339@La-Habana> Organization: EDVAX X-Mailer: Sylpheed 3.1.1 (GTK+ 2.24.5; i386-portbld-freebsd8.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list Reply-To: Polytropon List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Feb 2014 03:31:43 -0000 On Thu, 27 Feb 2014 19:32:48 +0100, Matthias Apitz wrote: > The bad block is there; if I restart the reading from 10 blocks before this > point, it stops at the same block: > > # dd if=/dev/da0 of=/dev/null bs=1m skip=712860 > dd: /dev/da0: Input/output error > 10+0 records in > 10+0 records out > 10485760 bytes transferred in 4.017767 secs (2609848 bytes/sec) Maybe you can use the "badblocks" tool provided by FreeBSD so this block can be "skipped". However, seeng this error often indicates that there are more bad blocks around the corner. :-) -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...