Memory Controller, Nonvolatile Storage Device, Nonvolatile Storage System, and Memory Control Method

A memory controller that writes or reads data in or from a nonvolatile memory having a plurality of address ranges each of which includes one or more physical blocks, the memory controller comprising:

• a read-write memory that temporarily stores an address management table including a first table and a second table, the first table managing a writing state of physical blocks in one address range, the second table managing states of physical blocks in a plurality of address ranges;
• a memory control unit that writes, in the nonvolatile memory, data and distributed management information used for generating the address management table and updates the address management table of the read-write memory when writing data, writes, in the nonvolatile memory, the address management table temporarily stored in the read-write memory when a data writing destination changes over from one address range to other address range, and reads out the second table from the nonvolatile memory to store the second table into the read-write memory at the time of initialization;
• and
• an address management table generation unit that reads out the distributed management information from the address range which is accessed before initialization, at the time of the initialization, generates the first table based on the read-out distributed management information, and stores the first table in the read-write memory.