Solid State Drives (SSD) are starting to replace conventional disk drives. They use semi-conductor memory to store data. Importantly they contain no motors or moving parts and are characterized by much higher speed read/write access and reduced power consumption.
Because of the use of semi-conductor memory, SSD provide astonishingly high levels of random access performance compared with even top-end 15,000 rpm disk drives. They benefit applications with high random access requirements such as databases.
In addition, with no motors or moving parts they have higher reliability than disk drives. This means that SSD is ideal for Tier 0 storage use. This improves storage layer optimization in systems that use Information Lifecycle Management (ILM).