Download yshadow0.2.zip (Source code: yshadow0.2-src.zip)

 

Version 0.2 Changes

For yintersync to work how we wanted it to we needed a tool

 

Rather than integrate this functionality into the yintersync-client executable we made our own command line tool for the task that yintersync then uses to create its shadow copies. We decided to keep it separate like this as it makes testing and diagnostics easier and also the tool could prove useful for other people out there (it would work really well in a robocopy batch task).

 

Yshadow detects which version of windows you are running on and uses the appropriate vshadow executable for that version of windows. Using the wrong vshadow would result in an error.

 

Yshadow can create a shadow copy and mount it as a drive letter on the following operating systems (as taken from the yshadow lookup table):

 

 

How it works

 

Yshadow uses the appropriate vshadow executable and creates a shadow copy with it. It keeps track of the shadow copies by creating a token file for each shadow copy located in 'resource\shadows'.

 

On Windows XP which does not support persistent shadow copies, yshadow launches the Windows XP vshadow application but keeps it running in the background. It then monitors the token file that is created and removes the shadow copy if this is deleted. Restarting the computer will also loose the shadow copy as it is isn't persistent

 

On all versions of Windows after XP yshadow uses the expose as drive letter functionality that vshadow has to create the shadow copy and then expose it. This can then be remove using yshadow. The shadow copy will remain after the computer has restarted