Patent ID: 8578110

Claim:
A memory data backup system comprising: a volatile memory module; a nonvolatile memory module to which data of the volatile memory module is backed up; and a memory controller for controlling a backup of the data from the volatile memory module to the nonvolatile memory module; wherein the nonvolatile memory module is mounted on a bus with an interface between the memory controller and the volatile memory module; wherein the interface of the volatile memory module being of the same structure as an interface of the nonvolatile memory module; wherein the memory controller, the nonvolatile memory module and the volatile memory module being mounted on the bus; and wherein on a condition of backing up data, stored in the volatile memory, to the nonvolatile memory module where there has been a power failure, the data is transferred from the volatile memory module to the memory controller when the memory controller issues a read request to the volatile memory module, and when the data is being transferred, the memory controller voluntarily reads the data and backs up the data to the nonvolatile memory module.