tors; preservation metadata (e.g., PDI) 
records; comparison of error logs to reports to administration; escalation procedures related 
to data loss; tracking of sources of incidents; remediation actions taken to remove sources of 
incidents. 
Discussion 
Having effective mechanisms to detect bit corruption and loss within a repository system is 
critical but it is only the initial step of a larger process. In addition to recording, reporting, 
and repairing as soon as possible all violations of data integr