You may use Darik’s Boot And Nuke (DBAN) to delete the data from a physical hard drive using the method below.
1. Press the ENTER key to start DBAN in interactive mode.
2. Entropy: Linux Kernel (urandom)
3. PRNG: Mersenne Twister (mt19937ar-cok)
4. Method: DoD 5220.22-M
5. Verify: Last Pass
6. Rounds: 3