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From: "Jason Pyeron" <jpyeron AT pdinc DOT us>
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Subject: RE: Mount of VSS volumes (//?/GLOBALROOT/...) does not work
Date: Mon, 11 May 2009 09:26:21 -0400
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> -----Original Message-----
> From: cygwin-owner at cygwin dot com [mailto:cygwin-owner at 
> cygwin dot com] On Behalf Of Christian Franke
> Sent: Friday, November 07, 2008 10:34
> To: cygwin at cygwin dot com
> Subject: Re: Mount of VSS volumes (//?/GLOBALROOT/...) does not work
> 
> Corinna Vinschen wrote:
> > On Nov  7 15:41, Christian Franke wrote:
> > > 
> > > The access to the path works, except the access to the 
> root dir of 
> > > the volume. It appears as a regular file which apparently 
> provides 
> > > raw read access to the partition:
> > > 
> > > $ ls -l '//?/GLOBALROOT/Device/HarddiskVolumeShadowCopy1'
> > > -rw-r--r-- 1 ... 0 Dec  1  2006 
> //?/.../HarddiskVolumeShadowCopy1 $ 
> > > xxd '//?/GLOBALROOT/Device/HarddiskVolumeShadowCopy1'
> > > 0000000: eb52 904e 5446 5320 2020 2000 0208 0000  .R.NTFS    .....
> > > 
> > 
> > The windows path handling code in Cygwin doesn't recognize 
> the path as 
> > the path to a drive's root dir.  The path normalization 
> code removes 
> > all trailing backslashes.  When accessing a root dir, 
> Windows requires 
> > a trailing backslash.  When accessing the volume without 
> the trailing 
> > backslash, it's opened for raw access.
> > 
> 
> Now I understand where the problem is. Thanks.
> 
> 
> > This is still a highly unusual situation from a POSIXy 
> point of view.
> > I'm not sure I want to slow down Cygwin for this any further.  It 

Could this be explained please?

> > seems the ability to mount a shadow volume as a dos drive is 
> > sufficient for this kind of problem, isn't it?
> > 
> 
> I agree.

The dosdev.exe is no longer downloadable from Microsoft.

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