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Date: Wed, 25 Feb 2009 19:57:09 +0100
From: Christian Franke <Christian DOT Franke AT t-online DOT de>
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Subject: Re: special name for vss shadow copy device?
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Greg Freemyer wrote:
> ...
> My personal desire is make a full dd copy of a snapshot onto a external drive.
>
> ie. dd if=/dev/sd-shadowcopy4 of=<my_image_file>
>
>   

With new Cygwin 1.7, the VSS volume image can be retrieved as follows:

dd if='//?/GLOBALROOT/Device/HarddiskVolumeShadowCopy4' of=...

But this does not work with Cygwin 1.5.


To access individual files, assign a drive letter X: to the VSS volume:

http://blogs.msdn.com/adioltean/archive/2006/09/18/761515.aspx
http://blogs.msdn.com/adioltean/archive/2005/01/20/357836.aspx

Then you can access the files via /cygdrive/x. This works with cygwin 
1.5 also. Only the WinXP explorer refuses to access the drive.

See also related discussion here:
http://cygwin.com/ml/cygwin/2008-11/msg00070.html

Hope this helps,
Christian


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