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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.
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.
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.
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 ...
Disk cloning is the process of duplicating all data on a digital storage drive, such as a hard disk or solid state drive, using hardware or software techniques. [1] Unlike file copying, disk cloning also duplicates the filesystems, partitions, drive meta data and slack space on the drive. [2]
Robocopy is a command-line file transfer utility for Microsoft Windows.Robocopy is functionally more comprehensive than the COPY command and XCOPY, but replaces neither.. Created by Kevin Allen [2] and first released as part of the Windows NT 4.0 Resource Kit, it has been a standard feature of Windows since Windows Vista and Windows Serv
2 "Shadow Copy" or "Previous Versions?" 1 comment. 3 How to use it in windows xp/2003. 2 comments. ... 10 Windows 8. 2 comments. 11 3rd Party Software for Shadow Copy ...
Background Intelligent Transfer Service (BITS) is a component of Microsoft Windows XP and later iterations of the operating systems, which facilitates asynchronous, prioritized, and throttled transfer of files between machines using idle network bandwidth.