The device controller (a) executes a data I/O process with respect to a physical storage area in accordance with an I/O command, and (b) sends to the storage controller an I/O command-related response comprising status information subsequent to being changed in accordance with the I/O process. The storage controller (A) receives the response from the target physical storage device, and (B) based on the status information included in the response received in (A), makes a determination as to whether or not to execute internal processing, and in a case where the result of the determination is to execute internal processing, sends to the target physical storage device an internal processing execution command instructing the execution of internal processing. The device controller in the target physical storage device (c), upon receiving the internal processing execution command, executes internal processing in accordance with the internal processing execution command.

Storage system and storage system control method

An embodiment of a non-volatile memory storage system comprises a memory controller, and a flash memory module. The memory controller manages the storage operations of the flash memory module. The memory controller is configured to assign a priority level to one or more types of house keeping operations that may be higher than a priority level of one or more types of commands received by a host coupled to the storage system, and to service all operations required of the flash memory module according to priority.

Scheduling methods of phased garbage collection and housekeeping operations in a flash memory system

A flash memory storage system having a flash memory controller and a flash memory chip is provided. The flash memory controller configures a second physical unit of the flash memory chip as a midway cache physical unit corresponding to a first physical unit and temporarily stores first data corresponding to a first host write command and second data corresponding to a second host write command in the midway cache physical unit, wherein the first and second data corresponding to slow physical addresses of the first physical unit. Then, the flash memory controller synchronously copies the first and second data from the midway cache physical unit into the first physical unit, thereby shortening time for writing data into the flash memory chip.

Flash memory storage system and controller and data writing method thereof

A storage system may include a queue included in a memory and a controller configured to store commands received from a host in the queue. The queue may have a linked-list configuration. In response to a triggering event, the controller may take a snapshot of the queue, creating a snapshot queue. The snapshot queue may have a linear configuration. Subsequent analysis or parsing of queued information may be performed on the linear snapshot queue instead of the linked-list queue. Modifications to the linear snapshot queue may be corresponding made to the linked-list queue.

Storage systems that create snapshot queues

A method for region-based management of non-volatile memory is provided. The method divides the storage space of all chips of a non-volatile memory into physical zones, physical block sets and physical page sets. The method also divides the logical space into virtual zones, virtual blocks and virtual pages. The physical block sets are the smallest units of space allocation and collection of the non-volatile memory. The physical page sets are the smallest units of data access of the non-volatile memory. The method includes a three-level address translation architecture, which is used to convert logical block addresses into physical addresses.

Method for region-based management of non-volatile memory

Phased garbage collection and house keeping operations in a flash memory system

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Phased garbage collection and house keeping operations in a flash memory system