As mentioned above, via proper management for the spare pool, the present invention may effectively reduce the latency of writing data (by preserving at least one erased block in the spare pool), and may also prevent potential physical damages (by limiting the time the blocks stay in the erase state). Meanwhile, the management mechanism may further combine with the garbage collection operation to perform more suitable writing on the erased blocks or to displace them.

Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.