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Computer Evidence: Collection and Preservation, Second Edition by Christopher L. T. Brown

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Tape Systems

Both corporations and individual users have used tape systems to archive data for long-term storage and support the need for data recovery. The archiving habits of users can often be beneficial to forensics investigations. In the civil arena, nightly backups and long-term storage of the tapes (often off-site) can provide historical snapshots of several points in time. The ability to show the evolution of a directory or file’s structure over a period of time can be quite useful in identifying specific changes. Consider a scenario in which three snapshots in history were provided of a tape backup system. One data set from January shows the contents of a file to be a certain way. The second snapshot, from the February tape backups, ...

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