Hardmac took apart a 2 TB Time Capsule and found something interesting. The uninteresting bit: there's really nothing new in the new Time Capsule -- same antennas, etc. The interesting bit: Apple claims to have a "server grade" hard drive in the Time Capsule. However, Hardmac discovered the drive inside is actually a Western Digital Caviar Green disk, a fairly common consumer grade hard drive. As Engadget points out, what qualifies a drive to be enterprise grade is the mean time between failure (MTBF), which we don't know for the Caviar Green because Western Digital isn't telling. In fact, based on this review at TechArp, there's no average seek or latency time given. You'd think a drive manufacturer would report these things, no?
Given previous issues with Time Capsules, we're hoping this doesn't become an issue in the future. "Server grade" can be interpreted in many ways, after all (I happen to have a first-gen G4 Mac mini set up as a server, but I wouldn't deploy that as a real server!). It's a shame to see Apple calling what appears to be a pretty vanilla drive something that it likely isn't.