1. A nonvolatile memory system comprising: a nonvolatile memory for storage arranged in multiple blocks for access; a volatile random access memory for read and write operations coupled to said nonvolatile memory; wherein the volatile random access memory and nonvolatile memory are controlled by one or more controllers; wherein the nonvolatile memory system is coupled to a central processing unit; wherein each block of the nonvolatile memory for storage has one or more pages of stored data accessible through the coupled volatile random access memory; and wherein each page of a block is adapted to be substituted on the fly for any other page of a different block through address mapping.