Method for improving the efficiency of reconstructing no mapping tables

摘要

A method for improving the efficiency of reconstructing no mapping table, characterized in that when a mapping table and a no mapping table are updated to a nand flash, the mapping table is first updated, then the update is written, and finally a write end flag is added, and when the solid-state hard disk is powered on, the end flag is first checked and if the end flag is correct, data of the no mapping table is continued to be read from the nand flash as initial data of the no mapping table in a cache of a solid-state hard disk controller; and if the end flag is abnormal, the mapping table is re-scanned to generate new initial data of the no mapping table, and information of the no mapping table in the nand flash is updated.