STORAGE DEVICE BASED ON A FLASH MEMORY AND USER DEVICE INCLUDING THE SAME

摘要

PURPOSE: A storage unit based on a flash memory preventing exposure of secure data and a user device including the same are provided to improve the response speed about a host command. CONSTITUTION: A host transmits a invalidation command to a storage device(S1100). If the capacity of a area to delete exceeds the reference capacity, a SSD(Solid State Drive) controller records a location of the area to delete(S1110,S1120). The SSD controller processes the data recorded in the area to delete to a invalid data without recording the location of the area to delete(S1140). The SSD controller notifies the completion of execution of the invalidation command to the host(S1130).