Untitled (Hidden Track): Born Digital Content Preservation Service at UIUC Tracy Popp, MS LIS, CAS Digital Preservation Coordinator University Library Stewarding Digital Content: Select Challenges – Not “eye legible” – dependent upon abstracted layers of hardware and software to understand – Maintaining authenticity /provenance – Resource issues – Working at scale – Hardware/software subject to relatively rapid obsolescence Computer Storage Media History * (*not complete) “Being aware of the context of relevant technology contributes to identifying and weighing options for preserving digital content. The path technology takes from idea, to development, to implementation, to mainstream use, and, in most cases, to obsolescence is an important cycle to appreciate.” – DPM http://www.dpworkshop.org/dpm-eng/timeline/index.html Punched cards (as early as 1725) Magnetic tape (1950s) http://upload.wikimedia.org/wikipedia/commons/thumb /d/d9/Punch-card-5081.jpg/800px-Punch-card-5081.jpg http://www.dpworkshop.org/dpm-eng/timeline/viewall.html http://www.computerhistory.org/timeline/?category=stor http://www.ricomputermuseum.org/Home/collectionsgallery/the-history-of-computer-data-storage Computer Storage Media History * Floppy disks 8 “ (1971) , 5.25” (1978) 3.5” (1981) (*not complete) Iomega Products ZIP (1994) , JAZ (1995) Optical Media: CD-Rom (1983) DVD (1995) Hard disk drives For microcomputers (1980) Others… jump/thumb/etc. drives (~2000) http://3.bp.blogspot.com/_acYR4s788c/SrurVIxREJI/AAAAAAAAF3g/grHF521RHg/s320/Optical+disk.gif http://www.dpworkshop.org/dpm-eng/timeline/viewall.html http://www.computerhistory.org/timeline/?category=stor http://www.ricomputermuseum.org/Home/collectionsgallery/the-history-of-computer-data-storage Magnetic Disk Geometry http://www.mtsac.edu/~rpatters/CISB11/Chapters/Chapter_03/Figures/Fig04-05.jpg Institutional Context University Library – Campus-wide network of libraries – Largest public university research library in U.S. • • thirteen million volumes 24 million items and materials Main Library building, East Entrance http://www.library.illinois.edu/bis/images/uiucmainlib.jpg Digital Preservation Coordinator’s Role • Manage the Born Digital Content Preservation service • Born Digital Content Reformatting lab Stabilizing content stored on physical media by migrating it from obsolete or obsolescent storage to a more contemporary, managed and replicated medium (e.g. networked-based storage) Cache of external drives Untitled (Hidden Track) • Digital forensics techniques and tools Hardware and software tools – Write blockers – Variety of adapters and technology bridges/interfaces – Disk imaging • • recovers all of the bits on a disk captures hidden content Kryoflux floppy controller diagram http://www.kryoflux.com / Digital Forensics Tools Hardware Forensics workstation (FRED – Forensics Recovery of Evidence Device) – Has write-blocking unit installed • Write blocker has adapters for a number of interfaces – IDE\SATA hard drives – USB 3.5”\5.25” floppy drive interface (using FC5025) – Provides a solid working platform – less of a need to maintain “computer museum” – Still need “Rosetta” computers http://www.digitalintelligence.com/previ ew.php?pic=/products/fred/images/fred_f ront_med.jpg&title=FRED Example Sousa Archives - Manion Laptop Challenges Other Digital Preservation Activities Medusa Digital Preservation Service Repository and Collection Registry • • • • • Already over 15TB of content Bit-level preservation fixity checking file verification with FITS Data redundancy File/Content Plans • • Working on migration case study Emulation also in the works Medusa by Caravaggio Thank You! Tracy Popp Digital Preservation Coordinator University Library tpopp2@illinois.edu