Data protection method, memory controller and memory storage device

• Main Author: LIN QINMIN
• Format: Patent
• Language: Chinese; English
• Published: 24.07.2013
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to a data protection method, a memory controller and a memory storage device. The data protection method is used for protecting a subdirectory stored in a replicate type non-volatile memory module and at least one prestored file in the subdirectory. The method comprises the following steps of receiving a writing instruction from a host system; and judging whether an writing address indicated by the writing instruction is an address of a file description block stored in the subdirectory; when the writing address is the address of the file description block stored in the subdirectory, judging whether one part of a data string corresponding to the writing instruction is the same as the corresponding content recorded in the file description block of the subdirectory or not; and if one part of the data string corresponding to the writing instruction is the not same as the corresponding content recorded in the file description block of the subdirectory, transferring the information which canno