Hello. Very new wth mac. Got my first power mac G5 running OS x 10.5.8. I want to add second hard drive. I took the 320GB hard drive out of my Dish Network HD DVR receiver. Tried to erase the data from the drive by using Disk Utility and did not go through. It detect the drive but show 0 byte. Does anyone know what can I do? Thanks for any help.