Well, fancy that -- a teardown of last week's refreshed Time Capsule has revealed a regular, non-enterprise drive lurking within. Curious, as Cupertino's website lists a "Serial ATA server-grade hard disk" as standard equipment on the device's official spec sheet. It's generally assumed that for a drive to be qualified as "enterprise," it must sustain a mean time between failure -- MTBF for short -- in excess of one million hours. So what's the MTBF for the Western Digital's WD20EARS (Caviar Green) in HardMac's Time Cap
