OPERATING METHOD OF MEMORY SYSTEM INCLUDING NONVOLATILE RANDOM ACCESS MEMORY AND NAND FLASH MEMORY

摘要

The present invention relates to an operating method of a memory system including a non-volatile random access memory and a NAND flash memory. The operating method of the present invention comprises the steps of: receiving a read request of the NAND flash memory; reading from the NAND flash memory in response to the read request; and re-reading according to a re-reading scheme of the NAND flash memory if read fails, and storing pass information associated to a read pass of re-read into the non-volatile random access memory.