The first 3TB external hard disks were announced recently and according to a report by Dutch tech site Hardware.Info the internal versions will arrive very soon. References to these parts have shown up at price comparison websites and the website got its hands on pictures of 3TB HDDs from Seagate and WD that are intended for the OEM market.
The Seagate Barracuda XT 3TB (ST33000651AS) model has a SATA 6Gbps interface, it spins at 7200RPM and features 64MB cache. The specifications reveal an average access time of 8.5ms and a noise level of 32dBA.
Western Digital's Caviar Green 3TB HDD (WD30EZRS) is limited to SATA 3Gbps, it spins at 5400 to 7200RPM and offers 64MB cache. The average access time is 8.9ms but with 29dBA the noise level should be a bit lower than that of the Seagate disk.