Low Level HD Format
sudo dcfldd if=/dev/urandom of=/dev/scN
Using /dev/urandom will do a better job than /dev/zero, but will take substantially longer to run.
LowLevelHDFormat
Revision 2 as of 2015-08-07 17:58:52
Clear message
sudo dcfldd if=/dev/urandom of=/dev/scN
Using /dev/urandom will do a better job than /dev/zero, but will take substantially longer to run.