From owner-freebsd-stable@freebsd.org Tue Aug 23 06:50:14 2016 Return-Path: Delivered-To: freebsd-stable@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 AC2C5BC31C7 for ; Tue, 23 Aug 2016 06:50:14 +0000 (UTC) (envelope-from estartu@ze.tum.de) Received: from mail.ze.tum.de (mail.ze.tum.de [IPv6:2001:4ca0:2e03::1:2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.ze.tum.de", Issuer "Zertifizierungsstelle der TUM" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 44E141A95 for ; Tue, 23 Aug 2016 06:50:14 +0000 (UTC) (envelope-from estartu@ze.tum.de) Received: from etustar.ze.tum.de ([IPv6:2001:4ca0:2e03:0:0:0:1:180]) by mail.ze.tum.de (8.15.2/8.15.2) with ESMTPS id u7N6oCZC078988 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NO) for ; Tue, 23 Aug 2016 08:50:12 +0200 (CEST) (envelope-from estartu@ze.tum.de) X-Authentication-Warning: hades.ze.tum.de: Host [IPv6:2001:4ca0:2e03:0:0:0:1:180] claimed to be etustar.ze.tum.de To: freebsd-stable From: Gerhard Schmidt Subject: Problems while reading from /dev/cd0 Reply-To: schmidt@ze.tum.de Organization: =?UTF-8?Q?Technische_Universit=c3=a4t_M=c3=bcnchen_-_WWW_und_O?= =?UTF-8?Q?nline_Services?= Message-ID: Date: Tue, 23 Aug 2016 08:50:12 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Aug 2016 06:50:14 -0000 Hi, I'm having some very curios Problems while reading from an BD-R recorded as a tar directly on the disk without a filesystem. When i try to read the Disk via 'tar tvvf /dev/cd0' i get the following output -rw-r--r-- 0 root wheel 5793264611 1 Jan 2015 file1.db tar: Error reading '/dev/cd0' Archive Format: POSIX ustar format, Compression: none tar: Error exit delayed from previous errors. reading the whole file via 'dd if=/dev/cd0 of=backup.tar bs=2048' and than 'tar tvvf backup.tar' the file is read without a hitch. So the data on the disk is OK but can't be read directly by tar. if i try the dd without the bs=2048 i get dd: /dev/cd0: Invalid argument 0+0 records in 0+0 records out 0 bytes transferred in 0.000115 secs (0 bytes/sec) So there is a problem reading anything other than 2048 byte blocks from a Disk. Reading directly with tar worked in the past. I really don't know how long it's there but i guess it's since i updated from FreeBSD 9 to FreeBSD 10. I running right now FreeBSD 10.3-RELEASE-p4 Here is the output from the kernel boot msg of the BRD Drive. cd0 at ahcich7 bus 0 scbus7 target 0 lun 0 cd0: Removable CD-ROM SCSI device cd0: Serial Number SIK9JFANE175 cd0: 150.000MB/s transfers (SATA 1.x, UDMA6, ATAPI 12bytes, PIO 8192bytes) cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed Regards Estartu -- ---------------------------------------------------------- Gerhard Schmidt | E-Mail: schmidt@ze.tum.de Technische Universität München | Jabber: estartu@ze.tum.de WWW & Online Services | Tel: +49 89 289-25270 | PGP-PublicKey Fax: +49 89 289-25257 | on request