Abstract: The invention introduces a method for controlling data access to a flash memory, performed by a processing unit, including steps of: obtaining a logical address associated with a data read operation; determining whether a group table corresponding to the logical address is queued in a locked queue, or a hot zone of a swap queue; and prohibiting content of the locked queue and the swap queue from being modified when the group table corresponding to the logical address is queued in the locked queue, or the hot zone of the swap queue.

Abstract: A mapping table updating method executable by a data storage device is provided. The data storage device includes a non-volatile memory and a controller. The mapping table updating method includes steps of: step A: configuring the controller to process a command issued by a host, and determine whether to trigger a partial garbage collection procedure when the command is a write command; when it is determined to trigger the partial garbage collection procedure, then performing step B: copying partial valid data in at least one source block to a destination block according to a segmentation condition; and step C: updating a logical-to-physical address mapping table of the data storage device according to a logical address of the copied partial valid data and a physical address in the destination block where the partial valid data is located, and returning to perform the step A.

Abstract: The invention introduces a method for controlling data access to a flash memory, performed by a processing unit, including steps of: obtaining a logical address associated with a data read operation; determining whether a group table corresponding to the logical address is queued in a locked queue, or a hot zone of a swap queue; and prohibiting content of the locked queue and the swap queue from being modified when the group table corresponding to the logical address is queued in the locked queue, or the hot zone of the swap queue.

Abstract: A mapping table updating method executable by a data storage device is provided. The data storage device includes a non-volatile memory and a controller. The mapping table updating method includes steps of: step A: configuring the controller to process a command issued by a host, and determine whether to trigger a partial garbage collection procedure when the command is a write command; when it is determined to trigger the partial garbage collection procedure, then performing step B: copying partial valid data in at least one source block to a destination block according to a segmentation condition; and step C: updating a logical-to-physical address mapping table of the data storage device according to a logical address of the copied partial valid data and a physical address in the destination block where the partial valid data is located, and returning to perform the step A.