1. A Storage Class Memory (SCM) memory mode Non-Volatile Dual Inline Memory Module (NVDIMM-N) cache system, comprising: a Storage Class Memory (SCM) subsystem; a Non-Volatile Dual Inline Memory Module (NVDIMM-N) subsystem including at least one volatile memory device and at least one non-volatile memory device; and a memory controller that is coupled to the SCM subsystem and the NVDIMM-N subsystem, wherein the memory controller is configured to: write a plurality of data to the at least one volatile memory device in the NVDIMM-N subsystem and, in response, update a cache tracking database; write a first subset of the plurality of data to the SCM subsystem subsequent to the writing of the plurality of data to the at least one volatile memory device in the NVDIMM-N subsystem and, in response, update the cache tracking database; and receive a shutdown signal and, in response, copy the cache tracking database to the at least one volatile memory device in the NVDIMM-N subsystem, wherein the NVDIMM-N subsystem is configured to copy at least some of the plurality of data and the cache tracking database from the at least one volatile memory device in the NVDIMM-N subsystem to the at least one non-volatile memory device in the NVDIMM-N subsystem prior to a shutdown associated with the shutdown signal.