Subseries I2: Optical storage, 1980 - 2016

Sub-Series — Multiple Containers

Scope and Contents

Subseries I2 includes 187 optical discs. Titles of discs have been taken from their original donor created labels. Dates denote the last modified date of the electronic files. Extents denote the total storage volume and file count per disc. Discs may contain electronic records that belong in multiple series.

Dates

Modified: 1980 - 2016

Conditions Governing Access

Access copies of electronic records are available for research upon request. Disk images, master copies and unprocessed file formats are restricted.

Full Extent

49.42 Gigabytes (56209 files)

Additional Description

Arrangement

Electronic records were processed separately from paper records. Files on discs were reviewed and grouped alongside paper records, where possible.

Processing Information

Disk imaging of 187 compact discs was completed using FTK imager or Guymager (within BitCurator). All directories (root, backup, deleted) were extracted. Search for private and confidential information was done using Autopsy or Bulk Reviewer (within BitCurator) and file format identification was done using DROID. Electronic folders were deduplicated and access copies were created using Python scripts. Disk images, extracted files along with their file metadata, and access copies have been saved to tape.

Commercially produced compact discs were not preserved. No access copies were created for special or proprietary file formats.

Processing of analog and digital materials is ongoing. Records are restricted till fully processed.