component
A component is a a group of files or folders, selected for backup, that are controlled by the application or service under the Writer's control.
requestor
Requestor is a software application such as backup software that requests that a volume shadow copy be taken.
shadow copy
A shadow copy is a read-only, frozen view of a volume's file system as it exists when the copy is taken, and can reside on a volume separate from the one that was copied. The shadow copy volume can exist on the same server as the original data but in a different share or mount point, or on another network-attached volume.
volume shadow copy service
Volume Shadow Copy Service is a service that coordinates various components to create consistent shadow copies of one or more volumes.
writer
Writer is a part of an application or service that works with VSS to prepare the application’s data into a consistent state at the time of the shadow copy backup request.
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