Noel Simen Otterness

System and method for efficient failover/failback techniques for fault-tolerant data storage system

Method and apparatus for providing a disc drive snapshot backup while allowing normal drive read, write, and buffering operations

Virtual incremental storage apparatus method and system

System and method for maintaining cache coherency and data synchronization in a computer system having multiple active controllers

Using multiple controllers together to create data spans

System, apparatus, and method providing cache data mirroring to a data storage system

System, apparatus and method for multi-level cache in a multi-processor/multi-controller environment

Methods and systems of cache memory management and snapshot operations

Apparatus method and system for fault tolerant virtual memory management

Method and apparatus for maintaining cache coherency in a storage system