Search results
Results from the WOW.Com Content Network
Shadow Copy (also known as Volume Snapshot Service, [1] Volume Shadow Copy Service [2] or VSS [2]) is a technology included in Microsoft Windows that can create backup copies or snapshots of computer files or volumes, even when they are in use. It is implemented as a Windows service called the Volume Shadow Copy service.
NTBackup from Windows XP and newer includes Volume Shadow Copy (VSS) support and thus can back up locked files. In the case of Windows XP Home Edition, NTBackup is not installed by default but is available on the Windows XP installation disc. [8] [9] Windows XP introduced a wizard-style user interface for NTBackup in addition to the advanced UI.
The Volume Shadow Copy Service (VSS) keeps historical versions of files and folders on NTFS volumes by copying old, newly overwritten data to shadow copy via copy-on-write technique. The user may later request an earlier version to be recovered. This also allows data backup programs to archive files currently in use by the file system.
As such, System Restore can use shadow copies that Backup and Restore created during a full system backup. [14] As mentioned above, Backup and Restore is merely a frontend. Windows ships with an alternative frontend for Windows Backup, the WBAdmin command-line utility. Only a member of the Administrators groups or the Backup Operators group can ...
XCOPY will not copy open files. Any process may open files for exclusive read access by withholding the FILE_SHARE_READ [16] XCOPY does not support the Windows Volume Shadow Copy service which effectively allows processes to have access to open files, so it is not useful for backing up live operating system volumes.
To avoid downtime, high-availability systems may instead perform the backup on a snapshot—a read-only copy of the data set frozen at a point in time—and allow applications to continue writing to their data. Most snapshot implementations are efficient and can create snapshots in O(1). In other words, the time and I/O needed to create the ...
Junction points should not be confused with a copy of something as junctions simply point to the original. If directories need to be modified separately a junction cannot be used as it does not provide a distinct copy of the directory or files within. Likewise, symbolic links and hard links are useful for merging the contents of individual files.
2 "Shadow Copy" or "Previous Versions?" 1 comment. 3 How to use it in windows xp/2003. 2 comments. 4 Style. 2 comments. 5 vssadmin Create Commnad. 2 comments. 6 ...