A mirrored memory for a data processing system. The memory system includes two device controllers and related disk drives for storing the mirrored data. Each of the disk drives is divided into logical volumes. Each device controller contains a plurality of reading processes and a correspondence table...http://www.google.ca/patents/US5987566?utm_source=gb-gplus-sharePatent US5987566 - Redundant storage with mirroring by logical volume with diverse reading process
