That HD is a 10,000 rpm 8 meg cache drive. Nice thing about the color classic and the LC 5XX models, is they have a nice ventilation fan on the back . I've installed quite a few scuzzy to CF and scuzzy to SD solutions for people and I find them to be slow . Personally I prefer my fast modern scuzzy solution in a vintage Mac. But as they say horses for the courses and different strokes for different folks and to each his own . Art mix and Mike McMaster are both great fellas to buy from seems.