PATA: parallel ATA, as opposed to SATA: serial ATA. Different drive spec.

Aluminum, you're going to have fun. Definitely use the ice cube tray.

The faster spinning drives can get the data in position for reading faster, basically. 5400 RPM would be laughable on a desktop. Servers generally use 10000 or 15000 RPM drives. Desktops generally use 7200 RPM, laptops generally use 5400 RPM, but the 7200s are available and provide a definite speed advantage.

I am the Doctor, and THIS... is my SPOON!