A memory system including a nonvolatile memory, a first controller connected to a host equipment, the first controller controlling the entire memory system, a second controller connected to the first controller and also connected to the nonvolatile memory, the second controller controlling an access process to said nonvolatile memory, the second controller receives a command via the first controller and carries out the access process to the nonvolatile memory according to the command, the command being input from the host equipment.