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Portability of guests based on differencing disks??

Source: microsoft.public.virtualpc
Sent: 09/06/2008
From: Bo Berglund <(email address - cut out)>
Message:

Over the years I have been creating a lot of XP test machines by using
a base vhd file where I installed XP-Pro SP2 back in 2006.
For each new guest I used to copy the vhd file to a new folder and
then create a new guest in VPC and point it to the copied disk file.
This works great, but fills up my hard drive with essentially
duplicated data (since I also use undo disks that are never
committed).

Now I am thinking of changing to a better strategy, to use a
differencing disk pointing to one single copy of my base disk file
(now readonly). My first strategy would be this:

All files reside on a USB2 connected 2.5" drive
1- Put the read only base VHD file in a folder \VPC\XP
2- Create a differencing disk in \VPC\XP\PC1
3- Create a guest defined by \VPC\XP\PC1\PC1.vmc

Repeat the steps 2-3 for each additional guest I need with different
guest folders (\VPC\XP\PC2 etc).

If I now would like to be able to move my guests along to another PC
with VPC2007, then I would unplug the USB drive from my first PC and
plug the drive into the other PC.

Questions:
-----------
Will VPC2007 on the other machine be able to find the various files in
different folders given the probable fact that the USB disk would get
a different drive letter on the new PC???
As far as I recall the vmc files keep full paths in their guest
definitions and this might screw things up?

Are there other caveats with this approach?
--

Bo Berglund (Sweden)

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