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.