Yes it happens with the DVD+RW (testet with dd now) and with DVD+R

Thank you for the byte interpretation.
Now I have a hint where to start with the debugging.

Regards
Gerold

On Saturday 01 March 2008 12:53:54 Sergey Vlasov wrote:

0x2a is the SCSI WRITE(10) command; the following 10 bytes look like
its arguments (bytes 2-5 - logical block address, bytes 7-8 - transfer
length in blocks); last 4 bytes seem to be another copy of the logical
block address.


Does this happen only with DVD-RAM?  Could you try with a DVD+RW disk
(these disks could also be written to with a simple "dd" after initial
formatting)?