Pretty much as the title says, I have tried using the vmfs-tools package on a USB bootable Ubuntu install, but the version of VMFS is too high for it to mount the partition. I currently have it passed through to my Windows VM, and trying VMFS recovery, but that doesn't seem to find the VMDK.
Any other methods I can try before trying to work out what I have lost?
I think the VMDK was around 1.4TB, but not full, as datastore I was trying to move it to has less than a terabyte free. The file I overwrote it with (same name) was a few kilobytes. I thought it was the pointer file for the VMDK, not the actual VMDK itself. I should have checked the extension.