A computing system including a memory, a processor and a solid state disk is provided. The memory stores a disk access driver program. The solid state disk includes a storage circuit and a control circuit. The control circuit includes a processing unit, a first access path and a second access path. The processing unit communicates with the processor through the first access path. The processor executes the driver program that enables the processor to process a disk access command for directly accessing the storage circuit of the solid state disk through the second access path.