Often times we all hear the same thing. The recommendations on where to put OLAP/OLTP databases, where to put the tempdb, where to put transaction logs...etc.
But say you are in an environment where the physical definition of the storage is a mystery to you. In other words, sure you can see logical drives, and you can give the system admin a call and ask for more space, but you never really know what is a different physical drive (say there's a SAN or a NAS behind the scenes). If you don't know this for fact, how can you follow best practices by putting, say, the heavily hit tempdb database on a different physical drive?
What's the best practice on this one?