Seagate 250 GB Momentus 5400.4 SATA Notebook Hard Drive Review

The Momentus 5400.4 is Seagate's second notebook hard drive to feature perpendicular magnetic recording (PMR) technology. By magnetizing the data bits perpendicularly to the plane of the platter, it allows a higher areal density than what was previously possible with the traditional method of longitudinal recording. @ Tech ARP