The entire VM looks messed up!
There are a couple snapshot files which I would expect because I do see a snapshot through the vSphere GUI. But there are multiples of multiple disks which does seem to correlate to anything...
I first tried to move the powered on machine by using the Migrate | Change datastore option in vSphere client.
That failed for unknown reason, but I have noticed that large VMs will often fail to migrate datastores while during on, so I powered off the machine (Power | Shut Down Guest) and then tried the migrate again which "worked"
I'm hoping that the missing data is on one of the MANY extra vmdk files, but this is a database server to the missing records will need to be merged with existing database. All in all a giant nightmare!
If this is just a strange once off problem that will never happen again, then fine. But if there is a common problem or was caused by a configuration problem on my end, I would really like to know for further migrations!
Thanks
Bob