How to delete a Win 7 OS off of an HDD after adding an SSD with the OS

[Lilshady313]

I currently have an SSD on the way and I want to know how I can get rid of the OS on my old HDD to make space?
On a side note... how to I completely wipe a drive so its like I just bought it brand new?
Final question... Will It work if I have more than 2 hard drives in my computer? (1 SSD, 2 HDD)

 

[joejoejrshab]

Bumping this cause I have yet to get an answer.