untitled (hidden track): born digital content preservation service at uiuc tracy popp, ms lis, cas...
TRANSCRIPT
Untitled (Hidden Track): Born Digital Content Preservation
Service at UIUC
Tracy Popp, MS LIS, CASDigital 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)
http://www.computerhistory.org/timeline/?category=storhttp://www.dpworkshop.org/dpm-eng/timeline/viewall.html http://www.ricomputermuseum.org/Home/collections-gallery/
the-history-of-computer-data-storage
http://upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Punch-card-5081.jpg/800px-Punch-card-
5081.jpg
Punched cards (as early as 1725) Magnetic tape (1950s)
“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
Computer Storage Media History * (*not complete)
Floppy disks8 “ (1971) , 5.25” (1978) 3.5” (1981)
http://www.computerhistory.org/timeline/?category=storhttp://www.dpworkshop.org/dpm-eng/timeline/viewall.html http://www.ricomputermuseum.org/Home/collections-gallery/
the-history-of-computer-data-storage
Hard disk drives For microcomputers (1980)
http://3.bp.blogspot.com/_a-cYR4s788c/SrurVIxREJI/AAAAAAAAF3g/-
grHF521RHg/s320/Optical+disk.gif
Optical Media: CD-Rom (1983)
DVD (1995)
Iomega Products ZIP (1994) , JAZ
(1995)
Others…jump/thumb/etc.
drives (~2000)
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 Entrancehttp://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/preview.php?pic=/products/fred/images/fred_front_med.jpg&title=FRED
ExampleSousa Archives - Manion Laptop
Challenges
Other Digital Preservation Activities
Medusa Digital Preservation ServiceRepository 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