The Precision T5810 has an SSD storage medium which is faster than the HDD storage medium found on most computers that have been around for the last year. Solid State Drives (SSD) store information in transistors on a circuit board rather than on optical or magnetic media. This has the advantage of being much faster than a traditional HDD drive.
An SSD storage medium is actually the best storage speed across all new medium processor core personal computers.
An HDD storage medium is the worst storage speed across comparable types of desktop computer.