Supporting caching on multiple libraries

Hi there,

I'm playing about with a wandboard and currently have it connected to my WHS shared music drive. I also have a need to take it to another location with the library on a different portable hard drive. I know I can just change the music directory to use the different source but my question is this: When I change the music directory is the cache from the other music directory lost/overwritten, or are both music directory caches kept? I am trying to avoid rescanning when changing music directory, is this possible?

CW