Hi, I'm using Centos 2.4.21-37.ELsmp. Under root user I can erase and burn a CDRW with succes. But under normal user it's impossible and the following error message appeared this is on the same machine. Any help ? Under normal user: Error ! -------------------------- /usr/bin/cdrecord -v dev=4,0,0 blank=fast Cdrecord-Clone 2.01a32-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling Note: This version is an unofficial (modified) version with DVD support Note: and therefore may have bugs that are not present in the original. Note: Please send bug reports or support requests to http://bugzilla.redhat.com/bugzilla Note: The author of cdrecord should not be bothered with problems in this version. TOC Type: 1 = CD-ROM scsidev: '4,0,0' scsibus: 4 target: 0 lun: 0 Linux sg driver version: 3.1.25 Using libscg version 'schily-0.8'. Segmentation fault With root user: Succes ! ----------------------- # /usr/bin/cdrecord -v dev=4,0,0 blank=fast Cdrecord-Clone 2.01a32-dvd (i686-pc-linux-gnu) Copyright (C) 1995-2004 Jörg Schilling Note: This version is an unofficial (modified) version with DVD support Note: and therefore may have bugs that are not present in the original. Note: Please send bug reports or support requests to http://bugzilla.redhat.com/bugzilla Note: The author of cdrecord should not be bothered with problems in this version. TOC Type: 1 = CD-ROM scsidev: '4,0,0' scsibus: 4 target: 0 lun: 0 Linux sg driver version: 3.1.25 Using libscg version 'schily-0.8'. /usr/bin/cdrecord: Warning: using inofficial libscg transport code version (schily - Red Hat-scsi-linux-sg.c-1.83-RH '@(#)scsi-linux-sg.c 1.83 04/05/20 Copyright 1997 J. Schilling'). SCSI buffer size: 64512 atapi: 1 Device type : Removable CD-ROM Version : 0 Response Format: 1 Vendor_info : 'PHILIPS ' Identifikation : 'DVD+-RW DVD8801 ' Revision : '4D28' Device seems to be: Generic mmc2 DVD-R/DVD-RW. Current: 0x000A Profile: 0x002B Profile: 0x001B Profile: 0x001A Profile: 0x0014 Profile: 0x0013 Profile: 0x0011 Profile: 0x0010 Profile: 0x000A (current) Profile: 0x0009 Profile: 0x0008 Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr). Driver flags : MMC-3 SWABAUDIO BURNFREE Supported modes: TAO PACKET SAO SAO/R96R RAW/R16 RAW/R96R Drive buf size : 1073152 = 1048 KB Current Secsize: 2048 ATIP info from disk: Indicated writing power: 5 Reference speed: 2 Is not unrestricted Is erasable ATIP start of lead in: -11635 (97:26/65) ATIP start of lead out: 359849 (79:59/74) 1T speed low: 0 (reserved val 0) 1T speed high: 4 2T speed low: 8 2T speed high: 0 (reserved val 10) power mult factor: 4 6 recommended erase/write power: 3 A1 values: 02 4C B0 A2 values: 4A C8 36 Disk type: Phase change Manuf. index: 3 Manufacturer: CMC Magnetics Corporation Starting to write CD/DVD at speed 4.0 in real BLANK mode for single session. Last chance to quit, starting real write 0 seconds. Operation starts. Performing OPC... Blanking PMA, TOC, pregap Blanking time: 49.918 __________________________ Ce message (et toutes ses pièces jointes éventuelles) est confidentiel et établi à l'intention exclusive de ses destinataires. Toute utilisation de ce message non conforme à sa destination, toute diffusion ou toute publication, totale ou partielle, est interdite, sauf autorisation expresse. L'IFP décline toute responsabilité au titre de ce message. This message and any attachments (the message) are confidential and intended solely for the addressees. Any unauthorised use or dissemination is prohibited. IFP should not be liable for this message. Visitez notre site Web / Visit our web site : http://www.ifp.fr __________________________