делаю:
growisofs -Z /dev/cdroms/cdrom0 /home/user/baghira/
WARNING: /dev/cdroms/cdrom0 already carries isofs!
About to execute 'mkisofs /home/user/baghira/ | builtin_dd of=/dev/cdroms/cdrom0 obs=32k seek=0'
/dev/cdroms/cdrom0: FEATURE 21h is not on, engaging DAO...
/dev/cdroms/cdrom0: reserving 896 block, warning for short DAO recording
:-[ RESERVE TRACK failed with SK=5h/ASC=30h/ACQ=05h]: Wrong medium type
/dev/cdroms/cdrom0: "Current Write Speed" is 4.1x1385KBps.
:-[ WRITE@LBA=0h failed with SK=5h/ASC=30h/ACQ=05h]: Wrong medium type
:-( media is not formatted or unsupported.
:-( write failed: Wrong medium type

диск: DVD-RW
привод: NEC 3500AG

как лечить?