Seagate Technology has entered the notebook hard disk drive market with volume shipments of its new Momentus HDD. Seagate claims its Momentus to be the industry’s first notebook hard disk to combine a high-performance 5400rpm spindle speed with the low battery-consumption of a traditional 4200rpm notebook hard drive

Seagate is well known for its quiet and rugged hard drives, and has made Momentus whisper-quiet by using proven Seagate SoftSonic FDB motors and the innovative QuietStep ramp load technology. QuietStep parks the heads safely off the disc during standby, but reduces the clicking sound typically made by other notebook hard drives when loading and unloading its heads to the ramp. Seagate’s rugged design gives Momentus a 225G operational shock tolerance, among the best in the industry. Momentus offers popular capacities of 20 and 40GB on a robust one-platter design, and is shipping to OEM customers now.

Acer and HP have already begun to integrate Seagate’s Momentus devices in their mobile personal computers.