1
Randal S Marks, Randy L Roberson, Diana Shen, Stephen J Sicola: Host transparent storage controller failover/failback of SCSI targets and associated units. Digital Equipment Corporation, Cathy L Peterson, Ronald C Hudgens, August 4, 1998: US05790775 (210 worldwide citation)

Provided herein is a method and apparatus for host transparent storage controller failover and failback. A controller is capable of assuming the identity of a failed controller while continuing to respond to its own SCSI ID or IDs in such a way that all SCSI IDs and associated units (LUNS) of the fa ...


2
Stephen J Sicola, Susan G Elkington: Controller-based bi-directional remote copy system with storage site failover capability. Hewlett Packard Development Company, November 4, 2003: US06643795 (110 worldwide citation)

A data replication system having a redundant configuration including dual Fiber Channel fabric links interconnecting each of the components of two data storage sites, wherein each site comprises a host computer and associated data storage array, with redundant array controllers and adapters. The sys ...


3
Clark Lubbers, Susan Elkington, Randy Hess, Stephen J Sicola, James McCarty, Anuja Korgaonkar, Jason Leveille: Flexible data replication mechanism. Hewlett Packard Development Company, September 20, 2005: US06947981 (106 worldwide citation)

A data replication management (DRM) architecture comprising a plurality of storage cells interconnected by a fabric. Flexibility in connectivity is provided by configuring each storage cell port to the fabric to handle both host data access requests and DRM traffic. Each storage cell comprises one o ...


4
Stephen J Sicola, James Pherson, Jesse Yandell: System for generating a point-in-time copy of data in a data storage system. Hewlett Packard Development Company, September 9, 2003: US06618794 (101 worldwide citation)

A system for generating a virtual point-in-time copy of a selected subset (e.g., a selected volume or logical unit) of a storage system. The present system operates by using a bitmap in storage system controller cache memory to indicate blocks of memory in the selected volume that have been overwrit ...


5
Stephen J Sicola, Susan G Elkington, Michael D Walker, James E Pherson, Paul Guttormson: Controller-based transaction logging system for data recovery in a storage area network. Hewlett Packard Development Company, December 2, 2003: US06658590 (95 worldwide citation)

A system which provides a completely redundant configuration including dual Fibre Channel fabric links interconnecting each of the components of two data storage sites, wherein each site comprises a host computer and associated data storage array, with redundant array controllers and adapters. The a ...


6
Stephen J Sicola, Susan G Elkington, Michael D Walker, Richard F Lary: Method for transaction command ordering in a remote data replication system. Hewlett Packard Development Company, December 2, 2003: US06658540 (95 worldwide citation)

A disaster-tolerant data backup and remote copy system which is implemented as a controller-based replication of one or more LUNs (logical units) between two remotely separated pairs of array controllers connected by redundant links. The system provides a method for allowing a large number of comman ...


7
Stephen J Sicola, Susan G Elkington, Michael D Walker, Paul Guttormson, Richard F Lary: System for data replication using redundant pairs of storage controllers, fibre channel fabrics and links therebetween. Hewlett Packard Development Company, July 29, 2003: US06601187 (94 worldwide citation)

A data replication system having a redundant configuration including dual Fibre Channel fabric links interconnecting each of the components of two data storage sites, wherein each site comprises a host computer and associated data storage array, with redundant array controllers and adapters. Each ar ...


8
Stephen J Sicola, Wayne H Umland, Clark E Lubbers, Susan G Elkington: Apparatus and method for synchronizing a cache mode in a dual controller, dual cache memory system operating in a plurality of cache modes. Compaq Computer Corporation, Ronald C Hudgens, William J Kubida, Hogan & Hartson, August 21, 2001: US06279078 (91 worldwide citation)

An apparatus and method for synchronizing a cache mode in a cache memory system in a computer to protect cache operations. The cache memory system has a first controller and a second controller and two cache modules and operates in a plurality of cache modes. The cache mode is stored as metadata in ...


9
Stephen J Sicola, Susan G Elkington, Michael D Walker, James E Pherson, Roger L Oakey: Controller-based remote copy system with logical unit grouping. Hewlett Packard Development Company, September 30, 2003: US06629264 (87 worldwide citation)

A data replication system having a redundant configuration including dual Fiber Channel fabric links interconnecting each of the components of two data storage sites, wherein each site comprises a host computer and associated data storage array, with redundant array controllers and adapters. The sys ...


10
Clark Lubbers, Susan Elkington, Randy Hess, Stephen J Sicola, James McCarty, Anuja Korgaonkar, Jason Leveille: System and method for ensuring merge completion in a storage area network. Hewlett Packard Development Company, April 18, 2006: US07032131 (81 worldwide citation)

Methods and systems for managing disk capacity allocated to a data log in a source data storage system during a merge process are disclosed. Data in the data log may be merged into corresponding data on a destination storage system connected to the source data storage system by at least one communic ...