Memory management storage to a host device

摘要

Systems and methods of memory management storage to a host device are disclosed. A method is performed in a data storage device with a non-volatile memory and a controller operative to manage the non-volatile memory and to generate management data for managing the non-volatile memory. The method includes performing, at a given time, originating at the controller data management transfer to a host device or originating at the controller data management retrieval from the host device.

主权项

1. A method comprising:
in a data storage device with a non-volatile memory and a controller operative to manage the non-volatile memory and to generate management data for managing the non-volatile memory, performing when the storage device is coupled to a host device:
determining whether there is a need to back up the management data;if it is determined that there is a need to back up the managements data, initiating the back up by originating at the controller a direct memory access (DMA) transfer of the management data to the host device wherein the DMA transfer includes sending, to a host processor or to a host DMA controller, an instruction to transfer the management data into a host memory;determining if there is a need to retrieve the management data; andif it is determined that there is a need to retrieve the management data and
the management data is retrievable from the host device, initiating a DMA retrieval of the management data, wherein initiating the DMA retrieval includes sending, to the host processor or to the host DMA controller, an instruction to retrieve the management data from the host memory, and receiving from the host device the management data retrieved from the host memory.