A computer storage system includes a controller and a storage device array. The storage device array includes a first sub-array and a fast storage device sub-array. The first sub-array includes one or more log-structured storage devices storing data. The fast storage device sub-array includes one or...http://www.google.com.au/patents/US7073029?utm_source=gb-gplus-sharePatent US7073029 - Storage system using fast storage and log-structured storage
