Tech Report posted a review on the Western Digital RE3 hard drive. Here's an excerpt:

Western Digital quotes a 113MB/s sustained data rate for the RE3, which is a good 7MB/s faster than the rated sustained throughput of the Caviar Black. I wouldn't put too much stock into that specification. WD originally claimed a 145MB/s data rate for the Caviar Black, and that's since been revised to 106MB/s. The results of our synthetic throughput and real-world file transfer tests will give us a much better indication of the RE3's sustained read and write rates.

Helping the RE3 keep bits moving is a dual-processor architecture inherited from the Caviar Black. The RE3 also features Western Digital's IntelliSeek just-in-time actuator mechanism, which only moves the drive head as fast as necessary to get it into position for the next data point rather than as fast as possible. IntelliSeek can help to reduce the vibrations caused by a drive head darting back and forth at full speed-an important consideration for tightly-packed RAID arrays.

As we've seen, the RE3 has lost none of the magic that made the Black so impressive. Western Digital has essentially taken a desktop drive whose performance suited workstation and server workloads and wrapped it up in an enterprise-friendly package littered with RAID-specific optimizations. Read Ahead Fast Forward and Time-Limited Error Recovery may not be necessary in single-drive desktops, but they're potentially important features for multi-drive applications that have to deal with different error recovery rules and additional environmental vibration.