Even though in Properties of Recycle Bin I have selected "Configure drives independently" and set the slave drive to 0% allowed for recycling; and selected "Do not move files to the Recycle Bin. Remove files immediately when deleted." when I open D:\Recycled, I see the same contents as in C:\Recycle Bin; moreover if I empty D:\Recycled, C:\Recycle Bin also
empties. However, if I look at the volume occupied, the two sites differ in size !
Is there a way to force true separation ?

Basty

Not from what I remember, you could try TweakUI and check out the extra options it has, but I seem to remember that didn't work either.

The deleted file will physically exist in the Recycled folder on whichever drive it's deleted from. I'm sure it's the Desktop.ini file in each Recycled folder that is causing the confusion. Whenever you open any Recycled folder from My Computer or Explorer it's telling windows to look in the Recycled folders on all the drives.

I imagine you could edit Desktop.ini so opening the folder would only show the actual files but I suspect if you did that then opening Recycle Bin on the desktop may not show the files on all the drives.