wing1112

put 2 hard drives in computer just put 1 master and the rest slave in jumper.  i have like 4 hard drives running in my PC.  if you want to use 2 hard drives space as 1 (e.g. 2*250GB but use as 1, 500GB for more efficiency).  you need 2 SATA(Not IDE, PATA, etc) hard drives in order to do so.