I am using a 3Ware 9500S-8 controller with 128MB of RAM, 4 SAMSUNG EcoGreen F2 HD154UI 1.5TB hard drives, RAID 5 w/ GUID partition, Windows Server 2008 R2, core2 proc w/ 2GB RAM, GUID. Latest firmware/drivers are installed. All drives have gone through a low level scan through the Samsung drive utilities. I thought it was a bad drive when the 3ware software started throwing sector errors on drive #3 after 4 days of formatting, but I replaced that drive and it is still taking forever. In 10 hours it's only 3% complete (guessing about two weeks until my format is done). A friend of mine has the exact same model card, drive models, number of drives, and firmware/driver version, and his format took about 2-3 days. Any guesses as to what is going wrong?