February 2026
Intermediate to advanced
456 pages
17h 3m
English
Windows Volume Shadow Copy (VSS) is a service in which state changes in blocks of data are compared daily and changed blocks are copied to a volume shadow. The VSS service runs once per day and stores change data as 16-KB blocks of data. In differential copies of VSS, only the changes are backed up, on a cluster-by-cluster basis. For a full copy or clone, entire files are backed up.
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