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Does anyone know of a command or tool to create disk snapshots on Windows 7 (client SKU)?

I see vssadmin.exe has a "create shadow" option, but that's available only on server SKUs: http://technet.microsoft.com/en-us/library/cc788055(v=ws.10).aspx

I've a backup tool that replicates changes (creations, modifications and deletions to files and directories) since last backup, to my backup volume. Before each time this happens I want to create a persistent snapshot on my backup volume. I could then mount previous snapshots to view previous backups achieving a behavior similar to that of TimeMachine in OS X.

This question has been asked before but unfortunately there weren't any good answers: Taking snapshots of filesystem/volume in Windows 7?

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I found that the tool I'm looking for is called VShadow and its available in Windows SDK. A search for 'Windows 7 VShadow' returned the following useful links -

http://edgylogic.com/blog/vshadow-exe-versions/

http://vscsc.sourceforge.net/

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Upon more research I found that 'persistent' snapshots are not strongly persistent. Windows overwrites them once there's not enough space to keep them around. So my original idea of treating snapshots as previous backups won't really work. Instead I'm going to use the 'Hardlink Shell Extension' and 'ln commandline hardlinks' tools developed by this guy: http://schinagl.priv.at/nt/ntutils.html

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