I have a Pioneer Dvd-U03S. In the function switch, where you can set Scsi Id, termination etc., the #6, as is written in the manual, sets the default sector size: ON= 512 bytes, OFF= 2048 bytes. I do not remember what was the factory default (manual say nothing). What's the meaning of the default sector size? And what could happen if you set 512 or 2048? Thanks!!