A semiconductor storage device includes a first nonvolatile memory to store user data of a file, a second nonvolatile memory to store management data of the file, the second nonvolatile memory being different in type from the first nonvolatile memory, and a controller to control read/write of data with...http://www.google.com/patents/US7958288?utm_source=gb-gplus-sharePatent US7958288 - Semiconductor storage device and method of controlling the same
