James L. Hafner IBM Research Division, IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120 (hafneralmaden.ibm.com). Dr. Hafner received a Ph.D. degree in mathematics from the University of Illinois, and he earned his undergraduate degree in mathematics at Santa Clara University. He spent time in academia at the Institute for Advance Study in Princeton, at the California Institute of Technology, and as a National Science Foundation Postdoctoral Fellow at UCSD, after which he joined the IBM Research Division. At IBM, he has worked in diverse areas, including number theory, complexity theory, image databases, and storage system and storage protocols. Dr. Hafner currently works in the Advanced Storage Technologies department at the IBM Almaden Research Center.

Veera Deenadhayalan IBM Research Division, IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120 (veeradus.ibm.com). Mr. Deenadhayalan received his B.E. degree in electronics and communication engineering from Madras University, India, and his M.E. degree in electronics engineering from Anna University, India, in 1991 and 1993 respectively. He has been involved with IBM storage systems research since 2003 and has been working on advanced RAID algorithms, scalable storage systems, undetected disk errors, and most recently, on the PERCS (Productive Easy-to-use Reliable Computing System) project. Prior to his efforts in storage research, he worked in the IBM Mylex Subsystems product development group, where he was a lead firmware developer of Mylex RAID adapters and was responsible for, among other things, the design and development of its second-generation disk metadata management.

Wendy Belluomini IBM Research Division, IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120 (wb1us.ibm.com). Dr. Belluomini is currently the manager of the Advanced Storage Technologies group at the IBM Almaden Research Center. She received her B.S. degree from Caltech in 1994, her M.S. degree from the University of Washington in 1996, and her Ph.D. degree from the University of Utah in 1999, all in computer science. She joined IBM in 1999 as a Research Staff Member at the IBM Austin Research Laboratory, where she led a research effort on high-speed circuit design. In 2005, she moved to IBM Almaden Research Center and in 2006 started in her present position. She is currently working on improving data integrity in storage systems. She holds seven patents and has published papers in the areas of formal verification, circuit design, and storage systems.

Krishnakumar Rao IBM Research Division, IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120 (kkraous.ibm.com). Mr. Rao is an IBM Distinguished Engineer and the Senior Manager of Advanced Storage Subsystems. His department, a part of the Storage Systems Research organization at Almaden, works on areas such as virtualization, server/storage synergy, scalability, reliability, and data integrity. Mr. Rao has been with the IBM Research Division at Almaden since October 2002 and has worked on reference storage, business continuity, advanced RAID algorithms, scale-out storage systems, distributed storage, and deferred maintenance. Previously, he was the CTO of Mylex Storage Systems, a former IBM subsidiary involved with the building of midrange storage subsystems and controllers. He has a B.S.E.E. and M.S.E.E. from IIT Bombay.