Seagate's huge hard drive performs well – Computerworld:
Seagate's barracuda 7200.10 750GB drive, the largest hard drive to date, sets new high-water marks for capacity, price and performance. Its speed was especially notable on the PC World Test Center's write tests, where it came within a hair's breadth of matching Western Digital's swift 10,000-rpm Raptor X.
This bodes well for cheap, large volume storage systems.
I'm particularly impressed to note that Seagate didn't faff around with going to 550, or 600 gig drives – they went straight from 500 to 750. A couple of TB in my server at home is looking more and more viable. So, speed = fast, size = huge, and apparently price = reasonable.
I wonder what reliability's like?