I have a 60 GB SSD where my Ubuntu installation and home folder is and a 1 TB HDD that I used to use as storage device (movies, music..). I have decided to sell the 1 TB drive but before I do that I want to completely erase all data on it or at least make it unrecoverable by most software out there. What I want to do is the following:
dd if=/dev/urandom of=/dev/sdc
and then quick format the drive using Disks utility.
My question is this: do I need to unmount the
/dev/sdc before I proceed with the