How-to erase a DVD-RW

[Wojciech Puchar]

>> which is exactly what i suggested - writing 0 byte disc
>
>
> that writes binary 0, the ASCII "NUL" character.  /dev/zero is NOT a 
> zero-size file.

yes it is

[wojtek at wojtek ~/NOBACKUP]$ dd if=/dev/null of=/dev/null bs=1
0+0 records in
0+0 records out
0 bytes transferred in 0.000037 secs (0 bytes/sec)


/dev/null simply gives EOF when trying to read