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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.
Macrium Reflect can create full, incremental and differential backup images, or selectively back up individual files and folders. Data is compressed and encrypted in real time using LZ-based compression and AES encryption algorithms. Images can be mounted as a drive letter in Windows Explorer and restored using a custom Macrium Reflect Rescue ...
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 ...
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]
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 ...
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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.