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NARA’s High Capacity Magnetic Media Study

NARA’s High Capacity Magnetic Media Study. Michael R. Carlson Director Electronic and Special Media Records Services Division. IASSIST Annual Conference June 14, 2002. Function Overview. Accessions permanent electronic records Preserves electronic records

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NARA’s High Capacity Magnetic Media Study

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  1. NARA’s High Capacity Magnetic Media Study Michael R. Carlson Director Electronic and Special Media Records Services Division IASSIST Annual Conference June 14, 2002

  2. Function Overview • Accessions permanent electronic records • Preserves electronic records • Provides access to electronic records

  3. Transfer Media 9-track open reel tapes 3480 cartridges CD-ROMS FTP & DLT New! Current Media Standards

  4. Archival Media 9-Track Tapes to 1992 3480 class cartridges from 1992 to present Archival Media

  5. Previous Studies NARA technology assessment report, June 1988 Media Stability Studies: Final Report, July 1994, NML Archival Media

  6. Why? Obsolescence Larger file sizes Demand Benefits to the archives community Archival Media Study

  7. Archival Media Study • Objective - To determine the stability and life expectancies of denser magnetic, in particular, IBM 3590, Digital Linear Tape (DLT), and Super DLT. • Goal - Compare tapes, evaluate, and select most suitable dense storage media.

  8. Time period and funding $287K October 2001 through June 2002 Final report end of July 2002 Archival Media Study

  9. Tests Aging Binder hydrolysis Resistivity Friction Error study Degradation Archival Media Study

  10. Aging Study - subject tapes to 40C/50%RH, 50C/75%RH. Object: To determine changes in the recording media resulting from environmental exposure Results: DLT exhibited least magnetic property changes Tests

  11. Binder Hydrolysis and Lubricant Study Object: To determine binder hydrolysis and lubrication content changes Results: Hydrolysis minimal for all samples and little change Tests

  12. Physical Property Study Object: To determine the physical and electrical changes Results: SDLT changed least Tests

  13. Error Study Object: To determine the error profile changes (UBER and STE) Results: DLT IV showed few errors Tests

  14. Degradation Study Object: To determine analog recording capability changes Results: SDLT most stable Tests

  15. Pricing, Availability, and Value 3590 drive expensive DLT IV and SDLT hold more data 3590 tapes least expensive DLT IV and SDLT better buy DLT IV readily available Business Issues

  16. Availability and Access Products are mature and readily available SDLT first of new generation of drives 3590 last of old generation Business Issues

  17. Pending items and other issues Life expectancy models Final recommendation Evaluation of single tapes Procedural changes What happens if 3480 support goes away? Business Issues

  18. Communications • Questions/comments? Michael R. Carlson Telephone: 301-837-1578 E-Mail: michael.carlson@nara.gov Fax: 301-837-3681 THANK YOU!

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