Sometimes speed is more important that storage capacity.

Seagate is addressing this market with their new 2.5" 15k rpm Savvio drives. The new drives will be available in 36GB and 73GB capacities, and have a blistering seek rate as low as 3.5ms.

Seagate points out that these draves are 70% smaller and use 30% less power than other 15krpm drives; and suggests using them in database, transaction processing and space constrained applications.