Shadow Copy (also called Volume Snapshot Serviceor VSS) is a feature in recent versions of http://www.answers.com/topic/microsoft-windows that allows taking manual or automatic backup copies or http://www.answers.com/topic/snapshot-game of a file or folder on a specific http://www.answers.com/topic/volume-computing at a specific point in time. It is used by http://www.answers.com/topic/ntbackup and the Volume Shadow Copy service to backup files. In http://www.answers.com/topic/windows-vista, it is used by Windows Vista's backup utility, http://www.answers.com/topic/system-restore-1 and the Previous Versions feature
ANSWER: You can change a file back to its previous version or just look at it in a previous version.
They are save in the System Volume Information folder on the volume that you have enabled Volume Shadow Copy on.
In Local Disk, Properties, Shadow Copies tab
Volume Shadow Copy
In the Properties dialog box for a file in a shadowed volume, select the Previous Versions tab
Volume Shadow Copy
To access a shadow copy on your D drive, you will need to check and see if the permissions allow you to view the copy. You can go to "Start", click on "D Drive" and then attempt to open the copy from there.
Volume Shadow Copy service or System Restore service
A shadow copy on D drive can be accessed through the system restore feature. It allows for the restoration of certain files depending on the current state of the system.
No Page 233 of the Windows 7 textbook this question is from: "Be aware that shadow copies cannot replace backups for data security. A shadow copy does not store a complete copy of the file, just changes. If the original file is lost due to data corruption or disk failure, you are not able to restore a shadow copy, but you can restore the file from a backup."
ANSWER: You can use the volume shadow copy to also back up files even though they are still being written to.
light and shadow
From Web Application point of view a Shadow copies runs when the production server is going through an update. The Shadow Copy runs meanwhile the server gets updated. The users connecting to the server during the update are served by the application Shadow copy.The Following is what I extracted from Wikipedia.Shadow Copies or Snapshots have two primary purposes: they allow the creation of consistent backups of a volume, ensuring that the contents cannot change while the backup is being made; and they avoid problems with file locking.By creating a read-only copy of the volume, backup programs are able to access every file without interfering with other programs writing to those same files.