Well, know I'm going to be a bit rude.
peatrap if you don't know what you're talking about - shut up!
There is no need what so ever to wipe the drive!!
Unless you intend to sell the drive that's nonsense
It's enough to format the partition that's to be reused. All the data is still there until you start writing to the disk, but it's unavailable for everything except software designed to rescue it.
To wipe the drive is (more than) overkill in (almost) all situations except when you want to sell the disk.