can't burn CD RW

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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


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