2 drive types in a Sun SL48 robot

Hi,

Yes I know I'm lazy haven't RTFM...

I got a Sun SL48 SCSI library with 2 drives (LTO3) but need one LTO4 as well.
Is it possible to have one LTO3 and one LTO4 in the same library?
Is there functionality in NBU determine 3 or 4?
Will my SL48 handle 2 different types?
 

My guess is that I would be able to, just wanna check the possibility before i dig into RTFM.

- Roland