So i'm doing some research on the old, new and newest type of pata drives. I'm currently doing studies for my ceritifications but i feel that when it comes to hard drives such as this, i should have a GOOD understanding of not just the new stuff but the OLD stuff too. I'm sure i'll see the old stuff . I seen where some say the old connectors are white with 40 pin and the new are blue with 80 pin, as well as some voltage differences too. However when i googled connector and connections, i see NEW white, black and blue connectors. So i'm abit confused. Are my books just old or is something going on that i have failed to see? And am i correct to feel i should have a good , clear understanding of VOLTAGES and Connectors to know applications that best fit each situation.