Hard disk based partition as SSD partition identified

In my notebook I have 2 partitions: C: and D:

C: is located on a SSD

and

D: on a hard disk

Now I mark partition D: on partition pane at the top and click "Analyze".

Afterwards I click on button right of it and "Defrag" menu.

Much to my surprise a warning pops up:

"Volume D: appears to be solid state. Defragmentation may reduce its lifetime. Are you sure to proceed?"

Why does Defraggler think that D: is on the SSD?

Or does Defraggler show only D: but mean C: (and want to defrag it)?

This is clearly a bug.

Pls fix this.

Thomas

Our dedicated moderator, Nukecad, answered this nicely here:

In short, though, it's a display issue; if you're certain that the D: drive is a conventional hard drive, then you are welcome to defragment the drive despite that warning notice. You can also attempt the winsat procedure listed in this post.

Our development team is aware of the issue.