What does the lock/rewrite part do?
I understand that it signals to the harddrive to begin rewriting itself, but how does it 'lock' it?
Also, should you begin writing to the first block right after it finishes beeping 5 times, or should you wait 33ms like on the table you put in the pdf?
EDIT: I sent a relay through the lock/rewrite part, but it did not reset all the memory blocks to 1, even though I didn't send anything else through the 'write transfer' part.