SymplySPARK XT is a combination of a hyper-efficient Thunderbolt RAID array with hyper-efficient Seagate drives in MACH.2 technology

By using Seagate MACH.2 hard drives, SymplySPARK XT is able to provide the speed of SSD drives from an array with SAS HDD drives. MACH.2 drives use innovative Multi-Actuator technology to increase read and write performance. Regular hard drives consist of a series of platters with a read/write head (actuator) floating above them.
A second actuator has been added to MACH.2 drives, which allows for increased read/write action with each turn of the platter. In other words: doubling the number of input/output operations (IOPS) per second.