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Areal Density ................. ......... _ion 3165, DC rence on ass ems nd Te ies for Spa_and Earth cienc lications t Volume I of a conference held at Space Flight Center Greenbelt, Maryland i July 23-25, 1991 (NASA-CP-3165-Vol-I) NSSOC CONFERENCE ON MASS STORAGE SYSTEMS ANO TECHNOLOGIES FOR SPACE ANO EARTH SCIFNCE APPLICATIONS t VOLUMF I (NASA) 205 p HI/82 a i | -. _- , !_ _ J t mj 1 m _ , i_ _ _ NASA Conference Publication 3165, Vol. I NSSDC Conference on Mass Storage Systems and Technologies for Space and Earth Science Applications Volume I Edited by Ben Kobler Goddard Space Flight Center Greenbelt, Maryland P. C. Hariharan and L. G. Blasso STX Corporation Lanham, Maryland Proceedings of a conference held at NASA Goddard Space Flight Center Greenbelt, Maryland July 23-25, 1991 National Aeronautics and Space Administration Office of Management Scientific and Technical Information Program 1992 Preface The National Space Science Data Center (NSSDC) at NASA's Goddard Space Flight Center has been charged with the archiving of data collected from NASA's scientific spaceflight missions flown over the past 30 years. During this time NSSDC has accumulated an archive of several terabytes of data. In the coming years NASA will be generating this volume of data every few days or less. Thus, data storage media and systems become critically important to NASA ff it is to successfully manage this data volume and to have a chance to transform these data into scientific knowledge. NSSDC will play an important role in NASA's awareness of and exploitation of emerging mass storage systems, both at NSSDC and in the increasingly distributed NASA scientific data environment. For this reason, NSSDC organized a conference at Goddard in the summer of 1991 to review the status of and the outlook for data storage media and systems. Leading experts in each of several areas were invited to make presentations, and a highly informative conference transpired. In order that the record of that conference be preserved, this set of presentations is being published. The Proceedings of the NSSDC Conference on Mass Storage Systems and Technologies for Space and Earth Science applications are published in four volumes, with each of the first three volumes containing the talks and presentations for that particular day. Discussions following some of the talks are collected in the fourth volume along with introductory biographical material on the speakers. Despite our best efforts, the questions and answers were sometimes inaudible to the transcriptionist. An effort was made to contact the participants to clarify the transcript, and we are grateful to the speakers who cooperated. The success of an endeavor of this magnitude depends on the generous help and cooperation of the participants. We would like to record our gratitude to the speakers, the audience, and in particular, to the following individuals and organizations for their assistance: The Program committee whose membership is listed in the front of each volume The session chairs who kept the schedule on track: Professor Bharat Bhushan of Ohio State University Dr. Barbara Reagor of Bellcore Dr. Robert Freese of Alphatronix Mr. Patric Savage of Shell Professor John C. Mallinson of Mallinson Magnetics Dr. Kenneth Thibodeau of the National Archives and Records Administration The members of the Panel Discussion and Professor Mark Kryder of Carnegie Mellon University who moderated the discussion The hard-working crew from Westover Consulting Dr. Dennis E. Speliotis of Advanced Development Corporation for his help with the transcript of the Panel Discussion Dr. James L. Green and the National Space Science Data Center Dr. J. H. King Dr. P. C. Hariharan Benjamin Kobler iii PI_ECED_NG PAGE BLANK NOT FILMED NSSDC Mass Storage Conference Committee Ben Kobler, NASA/GSFC (Chair) John Berbert, NASA/GSFC Sue Kelly, DOE/Sandia Elizabeth Williams, SRC/Bowie AI Dwyer, STX Corporation * P. C. Hariharan, STX Corporation * Sanjay Ranade, STX Corporation * Conference Coordinator Kim Blackwell, STX Corporation * * Hughes STX Corporation as of October 1, 1991 iv MASS STORAGE CONFERENCE PROCEEDINGS CONTENTS VOIXIME I- FIRST DAY- TUESDAY, JULY 23, 1991 I° Introduction ........................................................................................................... I- I Dr. Milton Halem, Chief NASA Space Data and Computing Division ° Enterprise Storage Report for the 1990s ................................................................ I-3 Fred Moore, Corporate Vice President, Strategic Planning Storage Technology Corporation 3. Optical Disk and Tape Technology ........................................................................ 1-33 Dr. Robert Freese, President, Alphatronix 4. Magnetic Disk ........................................................................................................ 1-69 Dr. John C. Mallinson, Mallinson Magnetics, Inc. Magnetic Tape ......................................................................................................... 1-79 L. Harriss Robinson, Manager, Mass Storage Systems Datatape, Inc. 6. Storage System Software Solutions For High-End User Needs ............................ 1-109 Carole Hogan, Director of Technical Development, DISCOS 7. File Servers, Networking and Supercomputers .................................................... i-145 Dr. Reagan Moore, San Diego Supercomputing Center ° Mass Storage System Experiences and Future Needs at National Center for Atmospheric Research ..................................................................................... I- 163 Bernard T. O'Lear, Manager, Systems Programming, Scientific Computing Division, NCAR ° The Long Hold: Storing Data At The National Archives ............ ...................... 1-183 Dr. Kenneth Thibodeau, Director, Center for Electronic Records, National Archives and Records Administration 10. Banquet Presentation ............................................................................................ 1-187 Dr. John C. Mallinson, former Director of Center for Magnetic Recording Research, University of California, San Diego V STORAQE CONFERENCE PROCEEDINC_ CONTENTS {Continued} VOLUME II - SECOND DAY- WEDNESDAY, JULY 24, 1991 1. Stewardship of Very Large Digital Data Archives ....................................................... 2-1 Patric Savage, Shell Development Company 2. High-Performance Storage Systems (Text Not Included in this Publication) ............ 2-7 Robert Coyne, IBM Federal Systems Research Division ° An Open, Parallel I/0 Computer as the Platform for High-Performance, High-Capacity Mass Storage Systems ......................................................................... 2-9 Adrian Abineri, APTEC Computer Systems 4. EMASSTM: An Expandable Solution for NASA Space Data Storage Needs ............. 2-21 Anthony L. Peterson, P. Larry Cardwell, E-Systems, Inc. 5. Data Storage and Retrieval System ............................................................................. 2-35 Glen Nakamoto, MITRE Corporation 6. The Challenge of a Data Storage Hierarchy: Data Archiving .................................... 2-55 Michael Ruderman, Mesa Archival Systems, Inc. 7. Network Accessible Multi-Terrabyte Archive ............................................................ 2-85 Fred Rybczynskl, Metrum Information Storage 8. ICI Optical Data Storage Tape ...................................................................................... 2-98 Robert A. McLean. Joseph F. Duffy 9. ATL Products Division's Entries into the Computer Mass Storage Marketplace ...... 2- I I0 Fred Zefler, Odetics Automated Tape Library IATL) I0. Panel D/scussion: ......................................................................................................... 2-122 Moderator: Dr. Mark Kryder Dr, Barbara Reagor, Bellcore Darlene M. Carlson, 3M National Media Laboratory Kazuhiro Okamoto, Sony Magnetic Products, Inc. Allan S. Hadad, Ampex Recording Media Corporation John W. Corcoran, Consultant/Ampex Corporation Dr. Dennis E. Speliotis, Advanced Development Corporation 11. Poster Session: ............................................................................................................. 2-237 Steve Atkinson, Ampex Recording Media Corporation Barbara Matheson, STX Corporation Kirby Collins, CONVEX Storage Systems vi MASS STORAGE CONFERENCE PROCEEDINGS CONTENTS (Continued) VOLUME Ill - THIRD DAY- THURSDAY, JULY 25, 1991 1. _'ibology of Magnetic Storage Systems .................................................................. 3-1 Dr. Bharat Bhushan, Ohio State University 2. Network Issues for Large Mass Storage Requirements ........................................... 3-73 James "Newt" Perdue, Ultra Network Technologies, Inc. 3. The Role of HIPPI Switches in Mass Storage Systems; A Five Year Prospective ...3-97 T. A. Gilbert, Network Systems Corporation . The National Space Science Data Center: An Operational Perspective ................. 3-127 Ronald Blitstein, Hughes STX Corporation/NSSDC Dr. James L. Green, NSSDC 5. EOSDIS / DADS Requirements ................................................................................. 3-141 John Berbert, Ben Kobler ° The Preservation of Landsat Data by the National Land Remote Sensing Archive ..................................................................................................................... 3-153 John E. Boyd, EROS Data Center . Status of Emerging Standards for Removable Computer Storage Media and Related Contributions of NIST ...............................................................................
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