Making a mounted volume searchable

Question

OK, this is something that should be ridiculously easy to do in Windows 7, but it simply doesn't work. All I want to do is find all files with a certain extension within a folder and its subfolders. Placing a *.sln in the search box in Explorer yields no results. .sln doesn't work either. The kind: and type: filters don't seem very useful either.

Without resorting to opening the command prompt or Powershell, is there a way in Explorer to list all files that have a particular file extension?

Update

I've found out the most probable cause of search not working, and updated the question accordingly. The directory I'm trying to search in is included inside of a "Mounted Volume"; in other words, a second hard drive is mounted to C:\Users\UserName\Folder, and searching inside of that folder does not work.

Is there a way to get Windows 7 to search within a mounted volume? The folder does not even appear in the indexed locations tree.

Answer 1

I figured it out now; although I could not add indexing to the mounted folder, I was able to add a secondary mount for the volume. In my case, I mapped the S drive to the volume, while still maintaining my home directory mount. Once that was added, I was able to add indexing to the S drive.