... ruined another DVD+R media ... tried growisofs direktly. No avail. What's going on?

Thank you for any help
Conrad

knoppix@ttyp0[knoppix]$ growisofs -Z /dev/scd1 -v -R -J /mnt/hda3/beccon/BilderVideo/8mm/roh/
Executing 'mkisofs -v -R -J /mnt/hda3/beccon/BilderVideo/8mm/roh/ | builtin_dd of=/dev/scd1 obs=32k seek=0'
INFO: ISO-8859-15 character encoding detected by locale settings.
Assuming ISO-8859-15 encoded filenames on source filesystem,
use -input-charset to override.
mkisofs 2.01a25-inofficial-iconv (i686-pc-linux-gnu)
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/harz
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/westreisen
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/Gerd Schulanfang Schierke Beckert Opa
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/Edda Tina Park Strand
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/Conrad Baby
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/Conrad Auto Edda Tina
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/EddaTina Park nicht gut
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/detlef hochzeit papstdorf zinnowitz
Scanning /mnt/hda3/beccon/BilderVideo/8mm/roh/Hullerbusch Strand Bad Park
Using 20_ED000.MOV;1 for /20_edda_tina_ewald_schildkröte.mov (20_edda_tina_schwimmen.mov)
Using EDDA_000.MOV;1 for /mnt/hda3/beccon/BilderVideo/8mm/roh/Conrad Auto Edda Tina/edda_tina_bad_park.mov (edda_tina_strand.mov)
Writing: Initial Padbock Start Block 0
Done with: Initial Padbock Block(s) 16
Writing: Primary Volume Descriptor Start Block 16
Done with: Primary Volume Descriptor Block(s) 1
Writing: Joliet Volume Descriptor Start Block 17
Done with: Joliet Volume Descriptor Block(s) 1
Writing: End Volume Descriptor Start Block 18
Done with: End Volume Descriptor Block(s) 1
Writing: Version block Start Block 19
Done with: Version block Block(s) 1
Writing: Path table Start Block 20
Done with: Path table Block(s) 4
Writing: Joliet path table Start Block 24
Done with: Joliet path table Block(s) 4
Writing: Directory tree Start Block 28
/dev/scd1: "Current Write Speed" is 6.1x1385KBps.
Done with: Directory tree Block(s) 14
Writing: Joliet directory tree Start Block 42
Done with: Joliet directory tree Block(s) 11
Writing: Directory tree cleanup Start Block 53
Done with: Directory tree cleanup Block(s) 0
Writing: Extension record Start Block 53
Done with: Extension record Block(s) 1
Writing: The File(s) Start Block 54
:-[ WRITE@LBA=220h failed with SK=5h/ASC=21h/ACQ=02h]: Input/output error
builtin_dd: 544*2KB out
write failed: Input/output error
/dev/scd1: flushing cache
/dev/scd1: closing track
/dev/scd1: closing session
knoppix@ttyp0[knoppix]$ mount /dev/cdrom1
/dev/cdrom1: I/O error
mount: mount point /mnt/auto/cdrom1 doesn't exist