Method and apparatus for differential backup in a computer storage system

This invention relates to data storage for computers, and more particularly to use of physical change data for backup and restoring of data. Method and apparatus for backup in restoring data on a computer system are disclosed. Backups may include a differential backup. In a differential backup, only...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: St. Pierre, Edgar J, Gill, Alton
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:This invention relates to data storage for computers, and more particularly to use of physical change data for backup and restoring of data. Method and apparatus for backup in restoring data on a computer system are disclosed. Backups may include a differential backup. In a differential backup, only some (but not all) segments of data in a primary copy are backed up. The segments may correspond to physical segments of storage in a storage system, rather than logical level segments of storage. The method and apparatus may include constructing a complete copy of a backed up element from an earlier fill backup and a subsequent differential backup.