You posted those links and then were told that the methods used in those links are not reliable.
Simply put, there is no reliable way to determine if a HDD is SSD or not, the existence of C code to approximate it does not prove that there is. If anything, it highlights the lack of accurate detection mechanisms. I would suggest listening to the people in this forum when they adamantly inform you that something is not possible in a reliable way.
As for $disk().unc, that is a supported part of the Windows API, completely unrelated in functionality and methodology to SSD. I don't see any value to knowing if a disk is SSD or not-- there is, however, value in knowing the network path of a connected disk (since that's the only way to access it).
