is a high-performance plug-and-play storage device that contains no moving parts. SSD components include either DRAM or EEPROM memory boards, a memory bus board, a CPU, and a battery card.

Because they contain their own CPUs to manage data storage, they are a lot faster (18MBps for SCSI-II and 35MBps for UltraWide SCSI interfaces) than conventional rotating hard disks. Therefore, they produce highest possible I/O rates.