You could try reading some of those VHDs in something like this:http://arainia.com/software/gizmo/overview.php?nID=4
the point is being able to extract the data.
As mentioned before 7zip might be able to let you see inside the VHDs to extract some data.
Most likely in a 64 bit system because you are talking about huge files.
Another solution could be to use commercial recovery software.http://www.diskinternals.com/ntfs-recovery/
This site looks interesting. I downloaded some of their free software but never tried
their proper recovery products. There is a claim in their pages that their products can mount VHD and read them
no matter what. Finding out will cost you dosh, but there is a chance of a try out.
About TesDisk. Are you talking running it against the disk where XEN is installed, or running it
against one of the VHDs on its own?
Does it give you any options like making an image?
Recreating or fixing the boot sector?
In your example, there are two partitions.
Do they both give an error when you try to List (P)?
In your example TestDisk proposes this as correct: 254 63
Did you try that? You can try without writing the changes.
But I gather that you already know that.
Some posts in this forum talk about disk geometry.
I don't know wether they apply or not.
Sometimes the information is sketchy but there are nuggets here an there.
I only list three messages. You can search for more. Look for Fiona, CGrenier or Remy.post7329.html#p7329post1093.html?hilit=tricky#p1093post2334.html?hilit=tricky#p2334
The Step by step guide has some advise on how to run the TestDisk executablehttp://www.cgsecurity.org/wiki/TestDisk ... executable
If you have an option to make an image of a partition, TestDisk will name it
something like image.dd - You can rename it your_name.img
and open it with 7Zip, as shown in this forum:http://forum.piriform.com/index.php?showtopic=34355
Another option may be to run PhotoRec to scan for the lost data, deselecting every file
option with "s" and then selecting only the files you are looking for (Quickbooks).
The problem here is that PhotoRec does not recover the files names as they were.
You can do that against an image as well. I don't know if you could run it against
a VHD file, but I suspect you can.
In any case, what happened to the two backups you mentioned at the beginning?
Do you still have them or did they get destroyed in the process?
If you still had them, it might be worth going back to version 1.1 (where you were safe and sound)
on a different disk (you could make clones to save you time), and try those backups again.
Best of luck