Compact flash (CF) memory is becoming an increasingly important storage medium. Its high density, portability, nonvolatility, and rapidly decreasing cost have positioned it to become the first practical solid-state mass-storage device. It provides throughputs for read and write accesses near SRAM modules. A new DSS designed specifically for embedded CF-based DASs and maximizes CF endurance while all data blocks wear out uniformly is proposed. The new DSS is currently implemented into four 128-MB prototype DASs.