ALEXANDRIA, Va., May 7 -- Yoshiaki Muto of Odawara, Japan, has developed a storage system for redundant writing of data.

According to the U.S. Patent & Trademark Office: "In a storage system allowing redundant writing, a technology is provided capable of achieving control including efficient return to redundancy while reducing load on a host and trouble for a user. The host performs the redundant writing of data into data volumes in primary and secondary storage apparatuses. Each storage apparatus retains information including update data from the host as a journal (update data history information). When one of two systems for redundant writing is in a failed state and it is to be ...