Synthesized backup set catalogs are created to more efficiently create
synthetic full backups of a data volume or to more efficiently restore a
data object of the data volume. In one embodiment, the synthesized backup
set catalog comprises n entries corresponding to n data objects,
respectively, of a data volume being backed up. The synthesized backup
set catalog can be created with the creation of an incremental backup of
the data volume. Each entry of the synthesized backup set catalog may
contain a backup identification (ID), wherein each backup ID identifies
at least one of two backup sets of the data volume.