ok let said i put a SATA hdd into an external casing ... i turn it on when i m using it ... and off it while i m not ... will that slowly deter my hdd ?

i know that it will be unusual to turn it on and off very often ... but somehow , in vista , if u let things go by default , the 2nd hdd u installed will went off by itself after a while if u not accessing it. and its kinda stupid , becos u hav to like keep it running all the time by select some song play from this 2nd hdd...