From owner-freebsd-questions@FreeBSD.ORG Mon Feb 23 05:14:59 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 65BF716A4CE for ; Mon, 23 Feb 2004 05:14:59 -0800 (PST) Received: from mail.ncipher.com (mail.ncipher.com [82.108.130.24]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3BB9543D31 for ; Mon, 23 Feb 2004 05:14:59 -0800 (PST) (envelope-from markk@knigma.org) Received: from cromer.ncipher.com ([172.23.135.200]) by mail.ncipher.com with esmtp (TLSv1:DES-CBC3-SHA:168) (Exim 3.34 #1) id 1AvFvG-00079p-00 for freebsd-questions@freebsd.org; Mon, 23 Feb 2004 13:14:58 +0000 Received: from lap.knigma.org (mourn.ncipher.com [172.19.133.171]) by cromer.ncipher.com (8.12.10/8.12.10) with ESMTP id i1NDEv3F001393 for ; Mon, 23 Feb 2004 13:14:57 GMT (envelope-from markk@knigma.org) Message-ID: Date: Mon, 23 Feb 2004 13:13:39 +0000 To: freebsd-questions@freebsd.org From: Mark Knight MIME-Version: 1.0 Content-Type: text/plain;charset=us-ascii User-Agent: Turnpike/6.02-U () Subject: ufs and Plextor PX-708A 1.04 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Feb 2004 13:14:59 -0000 I'm running 4.9-stable from November. I've recently installed a Plextor PX-708A v1.04 DVD rewriter. I'm getting good results using growisofs. On the belief that +RW support random access, for a bit of fun I created a ufs filesystem on the device with freshly formatted DVD+RW media: disklabel -r -w cd0c auto newfs /dev/cd0c mount -o noatime /dev/cd0c /mnt On the face of it, the mounted filesystem then appears to work. However, intermittently (within minutes, but after several MBs), read errors occur: >(cd0:ata1:0:0:0): READ(10). CDB: 28 0 0 1 65 a8 0 0 20 0 >(cd0:ata1:0:0:0): MEDIUM ERROR info:465b0 asc:11,5 >(cd0:ata1:0:0:0): L-EC uncorrectable error >(cd0:ata1:0:0:0): cddone: got error 0x5 back I'm probably being hopelessly ignorant. Should this work? I believe the drive supports DVD+MRW (Mt. Rainier), and that this is supposed to implement some sort of defect management. However, is OS support required as well? Any advise appreciated. -- Mark A. R. Knight finger: markk@knigma.org Tel: +44 7973 410732 http://www.knigma.org/