Understanding the preservation steps after data has been recovered from obsolete media.
Recovery is only the beginning
Successfully extracting files does not by itself create a sustainable preservation environment.
Verify the recovered data
Recovered files should be checked for expected names, structure, completeness and readability. Where possible, technical characteristics should also be recorded.
Record provenance
The recovered files should remain linked to the original media, identifier, recovery method and any relevant limitations.
Create fixity information
NARA states that electronic record files should have recorded fixities to support auditing. Checksums provide a practical way of detecting unexpected changes.
Move files into managed storage
The Library of Congress recommends copying content from external media into managed storage systems where it can be inventoried and monitored.
Create access copies when needed
Separate working or access copies can be created so that preservation files are not altered during routine use.
Retain the original where appropriate
The original disk or cartridge may remain important evidence and can document the provenance of the recovered data.
Frequently Asked Questions
Should recovered files be kept only on a USB drive?
No. Important recovered data should be moved into managed storage with backup and integrity controls.
What is a checksum?
A checksum is a calculated value that can be used to detect changes to a digital file.
Should the original floppy or disk be kept?
Where practical, yes. It can retain provenance and evidential value even after successful recovery.
Further Reading
Oxford Duplication Centre — Practical Expertise
Legacy data recovery requires the right combination of source assessment, compatible hardware, specialist imaging or extraction, careful verification and a managed destination for the recovered information. The objective is not simply to open an old disk, but to preserve and make the information usable.
Need DAT tapes digitised?
Oxford Duplication Centre provides professional DAT digitisation for individual tapes and archive collections, with preservation and access outputs tailored to your requirements.
WAV Audio Digitisation Request a Quote