The presentation begins with terms and definitions of digital preservation, obsolescence, fixity, migration, refreshing, and formats. Formats include hardware, software, media, and systems. The purpose of migration is:
- Avoid media failure
- Avoid obsolescence
- Benefit from new technologies
- “Data migration success rates are never 100%”
- Successive storage/migration cycles accumulate failures, data corruption and loss.
- Even if data migration is flawless, repeated migrations will take its toll on the data “the nearly universal experience has been that migration is labor-intensive, time-consuming, expensive, error-prone, and fraught with the danger of losing or corrupting information.”