Storage device using nonvolatile cache memory and control method thereof

Abstract

In a storage device, a high-speed read/write operation and low power consumption are realized and the service life of a storage medium which is a semiconductor memory can be made longer. The storage device includes a host interface, a command analyzing section which analyzes the contents of a command input from the host interface, a state determining section which determines the rotation state of a hard disk when a command analyzed by the command analyzing section is a command for instructing data writing, and a write processing section which transfers write data to the hard disk when the determination result of the state determining section indicates that the hard disk is being rotated and transfers the write data to the flash memory when the determination result indicates that the hard disk is not being rotated.

Dependencies are inferred from the claim text.