You might want to start with Jim Lidner's report that he recently completed for the Dance Heritage Coalition (see: http://www.archival.tv/index.php?p=47 ). Lance Watsky Preservation & Media Specialist Georgia Archives -----Original Message----- From: Association for Recorded Sound Discussion List [mailto:[log in to unmask]] On Behalf Of RA Friedman Sent: Friday, June 10, 2005 9:47 AM To: [log in to unmask] Subject: Re: [ARSCLIST] Longevity of data tape?-- Is there any information around about what is being done for long-term preservation of digital video? Uncompressed video files are very large, 27mb for every second of video at 30 fps. A full length movie can easily fill a small hard-drive. Anonymous SET ARSCLIST DIGEST <[log in to unmask]> wrote: I appreciate the numerous references to migrating data tapes every 5 years or so. However, that should not be misinterpreted to mean simple physical migration but should include a change of file format if warranted. As for the physical make-up of data tape I'm not sure. I do know that DV-CAM, R-DAT and other like miniature digital tape types are manufactured using evaporated metal. This method yields the most unstable tapes and should be used only for production and storage in the 3 - 5 year time frame only. I personally have seen tapes of both formats generate huge error counts after only a couple years. Kevin Irelan RA Friedman, Archivist Freedman Jewish Music Archive University Of Pennsylvania Webmaster, Yiddish-American Digital Archive (Not affiliated with University of Pennsylvania) http://yiddishsong.org Restored 78s in Real Audio --------------------------------- Discover Yahoo! Find restaurants, movies, travel & more fun for the weekend. Check it out!