Patent ID: 11954031
Assignee: KIOXIA CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 16:
17. A method performed by a controller of a memory storage system, the memory storage system being external to a host and comprising a non-volatile semiconductor memory device configured to store a look-up table (LUT) comprising entries, a volatile semiconductor memory device configured to temporarily store the entries of the LUT, the method comprising the steps of:
assigning a status indicator to each of a plurality of first regions in the LUT and a plurality of second regions in the LUT, the status indicator corresponding to one or more entries of a cached address of the volatile semiconductor memory device belonging to the first region or the second region of the LUT;
updating one or more status indicators, each an updated status indicator, and
copying, based on the updated one or more status indicators, the one or more entries in the volatile semiconductor memory device associated with either the first region or the second region containing the updated status indicator to the non-volatile semiconductor memory device.