A disk image provided an exact copy of the storage device onto a stable system, eliminating the need to continually access (possibly) deteriorating physical media in order to evaluate and appraise its content. Archivists were encountering digital media 2 formats likely at the end of their working life (e.g., floppy disks, CD-ROMs, ZIP disks, old HDDs), and separating the data from the fragile media was an important first step to protect against data loss. The purpose of this document and other outputs of DANNNG (Digital Archival traNsfer, iNgest, and packagiNg Group) is to demystify disk imaging and the decisions that factor into format selection, creation, handling, and retention.ĭisk imaging was integral to early guidance 1 for handling storage devices containing born-digital materials. Participation in the development of this document is not intended to imply a recommendation or endorsement by any of the authors or their employers, nor is it intended to imply that any specific software or toolkit is necessarily the best available for the purpose. Factor: Retention of important contextual information.Factor: Compatibility of the storage device or content. Factor: Type or condition of the storage device.Glossary terms (and synonyms) will be bolded the first time they are introduced in this document. This document was written in tandem with the DANNNG Digital Archives Technical Glossary.
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