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Tape drive Data recovery ARCHIVAL CONSIDERATIONS: A PRACTICAL APPROACH FROM A SMALL BUSINESS PERSPECTIVE
Abstract
Procedures were developed to create a digital archive for a moderate sized engineering firm. The two part process involved data recovery from past backup tapes and from various magnetic and optical media from earlier attempts of archiving digital information. It also involved creating procedures for preserving and archiving present and future information. The archival procedures were developed utilizing the major recommendations found in the literature that generally focused on libraries, corporations and governmental organizations. Headings: Digital archive Electronic archive Digital preservation
A Bibliography of Master's Papers from the University of North Carolina School of Information and Library Science
The reliability and longevity of any storage medium is a key issue for archivists and preservationists as well as for the creators of important information. This is particularly true in the case of digital media such as DVD and CD where a sufficient number of errors may render the disc unreadable. This paper describes an initial stability study of commercially available recordable DVD and CD media using accelerated aging tests under conditions of increased temperature and humidity. The effect of prolonged exposure to direct light is also investigated and shown to have an effect on the error rates of the media. Initial results show that high quality optical media have very stable characteristics and may be suitable for long-term storage applications. However, results also indicate that significant differences exist in the stability of recordable optical media from different manufacturers.
This article describes the evolution of the design of the FCLA digital archive, a preservation repository under development for the libraries of the public universities of Florida. The starting assumptions of the designers were challenged as they moved from theory towards implementation. The logic leading to changes in policy and in preservation strategies is described.
If digital documents and their programs are to be saved, their migration must must not modify their bit streams, beacuse programs and their files can be corrupted by the slightest change. If such changes are unavoidable, they must be reversible without loss. More over, one must record enough detail about each transformation to allow reconstruction of the original encoding of the bit stream. Although bit streams can be designed to be immune to any expected change, future migration may introduce unextpected alterations. Similarly, encryption makes it impossible to recover an original bit stream without the decryption key.
Two important classes of problems arise when long-term (more than
a decade) archival storage of magnetic tape recording is undertaken.
They include relatively minor concerns over the physical integrity of
the software (the tapes themselves) and unresolvable major concerns over
the long-term continued availability of the proper hardware (the
playback machines themselves) which are needed to make the archival tape
usable. In view of this, video recording systems as well as computer
data recording systems are examined. The archival stability of modern
tapes is assessed, and the archival stability of modern recorders is
discussed
Appendix B -Project Archiving Standard Operating Procedure
- Vii
VII. Appendix B -Project Archiving Standard Operating Procedure.............................24
What can go wrong with magnetic media?
- Ix
- Appendix D -Resources
- . . Applications
IX. Appendix D -Resources and Applications..............................................................27
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The Universal Preservation Format: A Recommended Practice for Archiving Media and Electronic Records
- Shepard
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Shepard, T and MacCarn, D. (2001). The Universal Preservation Format: A
Recommended Practice for Archiving Media and Electronic Records. Boston,
MA: WGBH Educational Foundation. Retrieved March 1, 2006, from
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http://info.wgbh.org/upf/pdfs/20010818-UPF_RP.pdf