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Hello, Holly, This is a fascinating project. I'm so glad it's getting done. As one of the people who might have had some input to this, I am, perhaps, prejudiced. With five copies (two full-bandwidth vault copies?) of the eacb asset, I think the important thing would be to spot-check the two different vaults of the Mitsui Gold full-bandwidth copies for error rates and playability. I think a small, random sample on a yearly basis would be good. The Plextor Premium drive provides some degree of feedback. Probably each year logging the errors from 100 randomly selected discs would be useful. I pattern of changing the discs while maintaining history over time might be very useful--especially with new additions coming in. It would be good to sample the major different batches of discs. Mitsui claim >100 year lifetime for this product if stored carefully. I think I read that you're keeping the two full-bandwidth copies separate--that is cruial. Two separate buildings, not in a common risk zone (i.e. wildfire, flood, etc.) would be ideal. Good luck! Richard -- Richard L. Hess http://www.richardhess.com/tape/ Quoting Holly Dzyban <[log in to unmask]>: > Sorry, guess I wasn't very clear there, was I? > > Our collection will eventually consist of roughly 15,000 Mitsui Gold CD-Rs, > each of which holds one copy of an analog recording. Say 6,000 will be in a > semi-closed archive, used only when the mp3 copies do not have high enough > sound resolution for our linguistic researcher. 9,000 will be stored in a > closed archive, only handled to make another CD copy if one of the 6,000 is > lost or damaged. Between the semi-closed and closed archives, we'll have five > copies of each recording, each on a separate CD. > > Is that enough information? Thanks so much for your help. > > Holly > > Don Cox <[log in to unmask]> wrote: > On 02/03/04, Holly Dzyban wrote: > > My organization is currently in the planning/creation phase of a > > digital recordings archive. I am trying to write the refresh plan, and > > was wondering if anyone had any advice as far as how and how often to > > check or replace the 12,000+ CDs in our collection. > > Are these commercial, moulded CDs, or are they CDs written in a > computer? > > How often will they be handled? > > Regards > -- > Don Cox > [log in to unmask] > > Save Indigenous Languages! > > HoChunk Renaissance > P.O Box 457 > Winnebago, NE 68071 > (402) 878-4135 > > [log in to unmask] > > --------------------------------- > Do you Yahoo!? > Yahoo! Search - Find what you’re looking for faster.