Hi, I am running Centos 4 (fully updated on this box). I removed the old DVD writer (/dev/hdc) and installed a new LG GH20 "Internal Super Multi DVD Rewriter" with a SATA interface - this shows up as /dev/scd0. When I insert a pre-recorded DVD autorun mounts it and displays the contents without any hassles. It appears to me that the required kernel modules are loaded - as copied below from lsmod output. sata_nv 18629 0 libata 111261 1 sata_nv sd_mod 17217 0 scsi_mod 125261 3 sr_mod,libata,sd_mod I am using Verbatim DVD-RDL blanks. When I try to write a pre-recorded iso to the DVD I get the following error message: [user at test]$ growisofs -dvd-compat -Z /dev/dvdwriter=<pre-recorded>.iso :-( /dev/dvdwriter: media is not recognized as recordable DVD: 10015 I have tried to do this as root with the same result. /dev/dvdwriter is a link to /dev/scd0 and has full read/write/execute permissions. Output of growisofs -version: * growisofs by <appro at fy.chalmers.se>, version 5.21, front-ending to mkisofs: mkisofs 2.01 (i686-pc-linux-gnu) Any suggestions will be welcome - if any further information is required I will do my best to supply it. I have Googled with the error message but only get reports of this problem and no solutions. TIA ChrisG