Abstract: A method for transferring a command from a host to a device controller and a system using the method are disclosed. The method includes the steps of: A. determining a segment size; B. dividing a command into a number of sections each having a size the same as the segment size; C. sequentially distributing the sections to n groups; D. changing distributing order to a reverse order or keeping the same distributing order in step C if a cycle of distribution is finished while there are sections left for distributing; E. restructuring the section(s) in each group as a sub-command after all sections are distributed; and F. providing the sub-commands to a device controller synchronously.

Abstract: The present invention relates to a forward/backward rotation switching mechanism, comprising: a cover, a turntable, a terminal-fixing body, a first contact terminal, and a second contact terminal. In the present invention, a plurality of dust-off trenches are especially formed on the peripheral edges of the turntable for preventing from the dust accumulation between the turntable and a cover; therefore, even if the forward/backward rotation switching mechanism is used in an environment having a lot of dust, the turntable can still be turned around because the dust is ruled out by the dust-off trenches.

Abstract: The present invention relates to a forward/backward rotation switching mechanism, comprising: a cover, a turntable, a terminal-fixing body, a first contact terminal, and a second contact terminal. In the present invention, a plurality of dust-off trenches are especially formed on the peripheral edges of the turntable for preventing from the dust accumulation between the turntable and a cover; therefore, even if the forward/backward rotation switching mechanism is used in an environment having a lot of dust, the turntable can still be turned around because the dust is ruled out by the dust-off trenches.

Abstract: Heat-spot distant type push switch structure comprises: a supporting terminal, a compression spring, a switching spring, an electrical terminal, and a sliding lever assembly. Compression spring, switching spring and the switching member of the sliding lever assembly are stacked for connection and facilitate the occupied space of the heat-spot distant type push switch structure capable of being reduced; moreover, the supporting terminal, the compression spring, the switching spring, the electrical terminal, and the sliding lever assembly are designed to particular structures for forming a specific distant between the switching member and the touch point of two contact points of the heat-spot distant type push switch structure, such that the switching member is away from the heat-spot produced by the two contact points; therefore the switching member can still not be fused after the heat-spot distant type push switch structure is long-term used.

Abstract: A communicating method between a storage device and an application program includes the following steps: the application program dynamically selects a block address in the storage device as a predetermined block address; and the application program performs a command write-in or state read-out process via the predetermined block address to communicate with the storage device.