Target disk mode problem, disk not see in Windows

[midimanmac]

Hi,

I,m trying to view my Mac Mini disk on a Windows based PC.

I booted the Mac into target disk mode.

The problem is that Windows Explorer cant see the disk.

I can see it using disk management but it will not let me assign a drive letter to it.

I,ve installed Media Fours Mac Drive so that I can read the data.

What could be the problem

 

[simsaladimbamba]

Maybe the partition map scheme or partition table is corrupt.
What happens when you boot into the restore media of your Mac mini and open Disk Utility there?
Can you verify the disk?