Seagate apparently went ahead of its planned CES announcement and today officially unveiled the world's thinnest 2.5-inch hard disk drive. Measuring just 7mm tall rather than the usual 9.5mm, the Momentus Thin drive is aimed at the increasingly popular ultra-thin notebooks and will come in 160GB and 250GB capacities.

While some laptop manufacturers have opted for 1.8-inch drives to help shave a few millimeters off their products, these new storage devices from Seagate are supposedly far cheaper to produce and should enable a new breed of entry-level thin notebooks and netbooks. Besides offering a slimmer profile, the 2.5-inch disks still perform at typical notebook speeds with a SATA II interface, 5,400RPM spindle speeds and an 8MB cache.
No prices were disclosed. The company is first offering the drive to OEMs and expects to ship them in January.
https://www.techspot.com/news/37320-seagate-unveils-worlds-thinnest-25-inch-notebook-drive.html