I formatted dvd-rw disc with the following command
dvd+rw-format -blank=full /dev/sr0
If I try the command
dd if=/dev/sr0 bs=2048 | hexdump -C, nothing happens.
How to verify that every bit of the disc has been erased?
You can use the
dvd+rw-mediainfo command to see if your DVD is totally blank:
If the DVD is blank:
dvd+rw-mediainfo /dev/sr0 | grep status Disc status: blank
dvd+rw-mediainfo /dev/sr0 | grep status Disc status: complete