Hi I have just bought a WD Raptor which has 8mb Cache and is SATA 150. I am running my OS on this hard drive and my other WD drive is 250GB 16mb cache 72000rpm and is SATA 300. The 250GB Drive i've decided to use for storage. Should i change the jumper settings on the 250GB Drive to run at SATA 150 or should i just leave it at SATA 300. and at times it does take a while to access files from my 250GB too. there are some other jumper settings on the back of both drives but i dont know which ones would be optimal for me. Thanx in advance. Intel Pentium 4 3Ghz Asus P5WD2 Premium Mother Board. 1.5GB RAm DDR2. BTW My DVDRW has dissapeared from My Computer too!