Method and apparatus for improving reliability of write back cache information

摘要

A nonvolatile random access memory is attached to a write back cache. In the case of a power loss (502), the cache is written to the nonvolatile memory (506) before the machine completely loses power. This may be accomplished by providing a power storage device for use in the event of a power loss. On restart, the contents of the nonvolatile memory are written to the write back cache (514) before any new information may be written. The data may then be written from the cache to the storage device as was intended before the power loss.