From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 7 Jul 2002 06:05:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 7 Jul 2002 06:05:09 -0400 Received: from smtp.polymtl.ca ([132.207.4.11]:49376 "EHLO smtp.polymtl.ca") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Sun, 7 Jul 2002 06:05:07 -0400 Message-ID: <3D2812F0.C3A4441D@sympatico.ca> Date: Sun, 07 Jul 2002 06:07:44 -0400 From: Christian Robert X-Mailer: Mozilla 4.79 [en] (X11; U; Linux 2.4.19-rc1 i686) X-Accept-Language: en, fr-CA MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: ittle problems with /dev/sr0 with 2.4.19-rc1 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Problem with read back a fresh written cdrom. [root@X-home:/btemp] # uname -a Linux X-home 2.4.19-rc1 #2 Sat Jul 6 03:10:16 EDT 2002 i686 unknown [root@X-home:/btemp] # ls -ld rescue.iso -rw-r--r-- 1 root root 6881280 May 19 22:26 rescue.iso [root@X-home:/btemp] # cdrecord dev=0,0 speed=4 -v rescue.iso Cdrecord 1.10 (i686-pc-linux-gnu) Copyright (C) 1995-2001 Jörg Schilling TOC Type: 1 = CD-ROM scsidev: '0,0' scsibus: 0 target: 0 lun: 0 Linux sg driver version: 3.1.24 Using libscg version 'schily-0.5' atapi: 1 Device type : Removable CD-ROM Version : 0 Response Format: 1 Vendor_info : 'SONY ' Identifikation : 'CD-RW CRX160E ' Revision : '1.0e' Device seems to be: Generic mmc CD-RW. Using generic SCSI-3/mmc CD-R driver (mmc_cdr). Driver flags : SWABAUDIO Drive buf size : 4183552 = 4085 KB FIFO size : 4194304 = 4096 KB Track 01: data 6 MB Total size: 7 MB (00:44.82) = 3362 sectors Lout start: 7 MB (00:46/62) = 3362 sectors Current Secsize: 2048 ATIP info from disk: Indicated writing power: 3 Reference speed: 6 Is not unrestricted Is erasable Disk sub type: High speed Rewritable (CAV) media (1) ATIP start of lead in: -11625 (97:27/00) ATIP start of lead out: 333750 (74:12/00) speed low: 4 speed high: 8 power mult factor: 1 5 recommended erase/write power: 5 A2 values: 26 B2 4A Disk type: Phase change Manuf. index: 0 Manufacturer: Illegal Manufacturer code Blocks total: 333750 Blocks current: 333750 Blocks remaining: 330388 RBlocks total: 336246 RBlocks current: 336246 RBlocks remaining: 332884 Starting to write CD/DVD at speed 4 in write mode for single session. Last chance to quit, starting real write in 0 seconds. Operation starts. Waiting for reader process to fill input buffer ... input buffer ready. Performing OPC... Starting new track at sector: 0 Track 01: 6 of 6 MB written (fifo 100%). Track 01: Total bytes read/written: 6881280/6881280 (3360 sectors). Writing time: 18.307s Fixating... Fixating time: 61.619s cdrecord: fifo had 109 puts and 109 gets. cdrecord: fifo was 0 times empty and 7 times full, min fill was 89%. [root@X-home:/btemp] # md5sum /dev/sr0 md5sum: /dev/sr0: Input/output error <- oups, it failed [root@X-home:/btemp] # dd if=/dev/sr0 | md5sum dd: reading `/dev/sr0': Input/output error <- failed here too 13440+0 records in 13440+0 records out 5ec08b6fa7bf09741d1310e5baa800de - <- but md5sum is OK [root@X-home:/btemp] # md5sum rescue.iso 5ec08b6fa7bf09741d1310e5baa800de rescue.iso [root@X-home:/btemp] # cat /dev/sr0 > xxx [root@X-home:/btemp] # diff xxx rescue.iso [root@X-home:/btemp] # cksum /dev/sr0 3592423142 6881280 /dev/sr0 [root@X-home:/btemp] # cksum rescue.iso 3592423142 6881280 rescue.iso [root@X-home:/btemp] # dd if=/dev/sr0 | md5sum <- Note this one do not get input/output error 13440+0 records in 13440+0 records out 5ec08b6fa7bf09741d1310e5baa800de - [root@X-home:/btemp] # md5sum /dev/sr0 5ec08b6fa7bf09741d1310e5baa800de /dev/sr0 [root@X-home:/btemp] # md5sum /dev/sr0 rescue.iso 5ec08b6fa7bf09741d1310e5baa800de /dev/sr0 5ec08b6fa7bf09741d1310e5baa800de rescue.iso [root@X-home:/btemp] # md5sum /dev/sr0 rescue.iso <- it now work every time 5ec08b6fa7bf09741d1310e5baa800de /dev/sr0 5ec08b6fa7bf09741d1310e5baa800de rescue.iso [root@X-home:/btemp] # eject After re-insertion... [root@X-home:/btemp] # md5sum /dev/sr0 rescue.iso md5sum: /dev/sr0: Input/output error <- inout/output error on /dev/sr0 5ec08b6fa7bf09741d1310e5baa800de rescue.iso Can someone reproduce the "Input/output error" I get sometimes with "dd" and with "md5sum" on /dev/sr0 after burning a new CD ? I'm pretty sure it was not doing that with 2.4.18 Looks like it fix itself after several minutes or many trys. running 2.4.19-rc1 Xtian.