Hi, For years that i've been recording CDs and DVDs and all well. Now, i can't in CentOS-4 First i run: # mkisofs -r -J -o cd_backup cd/ Then # cdrecord -scanbus Output is: cdrecord: Warning: controller returns wrong size for CD capabilities page. 1,0,0 100) 'SAMSUNG ' 'CD-ROM SC-148F ' 'F008' Removable CD-ROM 1,1,0 101) 'HP ' 'CD-Writer+ 9500 ' '1.0e' Removable CD-ROM 1,2,0 102) * 1,3,0 103) * 1,4,0 104) * 1,5,0 105) * 1,6,0 106) * 1,7,0 107) * [root at tux gamito]# So, i used to record using: # cdrecord -v speed=16 dev=1,1,0 -data cd_backup But i get this error: "[root at tux gamito]# cdrecord -v speed=4 dev=1,1,0 -data cd_backup cdrecord: No write mode specified. cdrecord: Asuming -tao mode. cdrecord: Future versions of cdrecord may have different drive dependent defaults. cdrecord: Continuing in 5 seconds... Cdrecord-Clone 2.01-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: '1,1,0' scsibus: 1 target: 1 lun: 0 cdrecord: Success. Cannot open SCSI driver. cdrecord: For possible targets try 'cdrecord -scanbus'. cdrecord: For possible transport specifiers try 'cdrecord dev=help'." Any ideas ? Thanks in advance Warm Regards, Mário Gamito