Hi,
I'm running Hyper-V 2012 R2 as part of Server 2012 Essentials.
As seems common from other threads I've read I have created an expanding VHDX with a maximum size too large (almost the same size as the physical disc it lives on). Although there is only around 350GB of data in the VHDX, the actual file size is approaching 900GB on the host.
I'm using the "Add New Virtual Disk" wizard to make a new VHDX to replace this massive file. I want the contents of the old VHDX to be copied to the new one so in the add disk wizard I selected the option to copy the contents of my new disk from the original.
So my question is: the source VHDX is 900GB, the data inside the is around 350GB. What size is my new VHDX likely to be? Is it likely to reduce to nearer the actual data size?
I'm asking because I'm currently running this operation to an external USB drive and it's painfully slow - going to take hours to complete. If the size isn't going to reduce I may as well cancel it and look for a better option.
Any comments appreciated.
David