Patent ID: 9582370
Date: 2017-02-28
CPC Classifications: G06F,G11C

Claim:
1. A memory system comprising: a nonvolatile memory; a volatile memory; and a memory controller configured to perform data management in the nonvolatile memory based on management information stored in the volatile memory, wherein the memory controller stores in the nonvolatile memory a log being updated according to an execution of data writing processing, and the management information; and when a power supply to the memory system is reduced without a notice from a host apparatus, the memory controller updates the management information in the volatile memory based on the management information and the log stored in the nonvolatile memory, and to store the updated management information in the nonvolatile memory, and the log includes first information, the first information indicating a change that is to be made to the management information when the data writing processing is executed in the nonvolatile memory.