Digital Preservation File Integrity Digital Stewardship Curriculum Digital

Digital Preservation File Integrity Digital Stewardship Curriculum

Digital Preservation Review Digital Stewardship Curriculum

Digital Preservation ● Runs through all digital projects ● Ongoing conversation with others in your institution ○ IT, administration, other departments ● Digital Storage ○ 3 -2 -1 backup system ○ Storage media options ○ Revisit storage setup every few years

Storage Review ● Integrate with what IT already has ● Plan for what you have now and in the future ● Figure out your storage needs and solutions

Versions of your Files ● Preservation Master files ● Access copies ● Web Ready copies

Digital Preservation File Integrity Digital Stewardship Curriculum

File integrity Ensuring your file has not changed overtime Fixity Security Write Blockers Virus Scans

“Fixity” ● Definition: Stability of a digital object ● Files should remain unchanged over time ● Digital files can degrade without warning

Levels of Fixity Checks ● Simple steps: Expected file size, expected file count ● Good/Better: Higher level of detail MD 5 (hash algorithm) ● Best: Use a use tool that uses SHA 1 (hash algorithm)

How to check/store fixity info ● Standalone software applications ○ MD 5 Summer, Fixity, Jacksum, BWF Metaedit ● Integrated into content management systems ○ Dspace, Islandora, Rosetta

MD 5 Summer

Alongside other metadata

Within Fixity logs or Fixity DB

When to Check Fixity ● Run a checksum tool ○ When created ○ At regular intervals (monthly, weekly) ○ During a change (transfer, recovery)

Security ● Know who has access to your files ● Have policies and/or technology in place to restrict access to appropriate people ● File System Logging (Something to discuss with IT)

Integrity - People and Questions Who do I need to talk to? IT Department Staff in your department Anyone who is responsible for ingest of new files, management of files Whoever is responsible for system or network security and department/collection security

Integrity - Information What do I need to know or find out? ● Does your department /IT already check fixity? ● Who on your staff (or other departments) has permissions to view/edit/delete digital files? ● Are regular virus checks run on computers? What about when new digital collections come in?

DP Activities List - Integrity [Initial Activities] -Inventory existing digital content -Research tools, equipment, other policies you may want to use in your organization [Upon Ingest or File Creation] -Run virus checks -Run fixity checks

DP Activities List - Integrity [Regularly] -Run fixity checks [Less frequently] -Research new tools, equipment, or policies that you may want to use in your organization [Disaster] -Assess what loss or damage has occurred

DP File Integrity in Policies What policy or document will relate to file integrity? Digital Preservation Plan or Policy Quality Control Workflows for managing and transferring files

Quality Control When digitizing. . . Digitize ONCE, at the highest possible quality Copy, edit, and share lower quality access copies Preservation master Access copy Web ready copy

Quality Control Review Two or more step process Design for many stages of your workflow Develop from beginning Include Quality Control into your policies Sample large projects

Create your Quality Control Workflow Walk through all steps and make sure QC is built in Match goals of the project to QC Be consistent! Control your QC environment Document workflow and results

When to Perform QC Checking while digitizing After digitizing a batch Metadata When transferring to storage (checksum time!) After uploading or preparing to share Second pass by other staff or supervisor

3 -3 -3 Digital File Integrity Action Plan Fill out worksheet ●People ●What you know ●What to find out/accomplish

Digitization Policy – Structure/First Steps • Selection Criteria • • What you want/don’t want Where your materials are coming from • Criteria for Digitization • • Purpose/Goals/Objectives Legal, Cultural, Ethical, Social and Permissions • Criteria for Access and Use • Who, What, Where, When, How?