The HP 128 GB Solid State Drive provides many performance & durability improvements over traditional Hard Disk Drive (HDD) technology. With no moving parts, solid state drives do not need to spin up or mechanically seek files like conventional hard disk drives do. These drive characteristics significantly improve boot-up, shut down, & application loading times as well as overall application responsiveness. The HP 128 GB Solid State Drive achieves sequential read rates of up to 250-megabyte (MB)/sec & sequential write rates of at least 140-megabytes (MB)/sec.