Western Digital Scorpio Black 750 GB.  It is not a normal Scorpio Black, in that it is a 5400RPM 2.5" drive, not the larger faster form it is usually in.  The power draw is mitigated by using only two platters and the use Advanced Format Technology helps speed sequential reading.  For random reads and writes however, Tech ARP’s testing showed the older 500GB model to be faster.

Supersize your mobile storage with WD's 750GB HDD - Storage  1

"Today, we will look at the ultimate drive from the Scorpio Black family – the 750 GB WD Scorpio Black (WD7500BPKT) hard disk drive. With 750 GB of storage capacity packed into just two platters, this drive promises to provide the best combination of performance and storage capacity."

Here are some more Storage reviews from around the web:

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