What is the difference between ATA, SATA, UltraDMA and what is IDE? What's the connection between all of the HDD keywords I keep hearing? I am trying to figure out compatibility of a HDD to my mobo and none of the terms seem to match. My mobo's IDE connectors are: 2x UltraDMA 133 up to 4 Devices, and the HDD I want is Ultra ATA/100 interface. I am still a newb and confused. Thanks!