Windows 2008 Clusdisk.sys and Clusnet.sys where is this?

The location of cluster devices were changed in windows 2008.
On the windows 2003, We can found that on the non plug and play devices, but on the windows 2008 it has invalved in it’s original location. for exemple, clusnet is located on network devices and clusdisk is located on system devices.

but i had have some troubles to find it… :)