Server 2012 R2 & SMB3: Is there such a thing as a directory cache?

[BlizzardX]

I'm testing server 2012 r2 for my jbod storage server and wondered whether this version had a kept copies of the files/folders stored on the HDDs in memory so that when the drives are spun down you don't have to wait for ages to access them while they spin up?

Thanks,

Chris

 

[BlizzardX]

Thanks guys, yes directory caching seems to be at work with my windows 8.1 client connected to the server. Is there any information available on how much data a client or the server can cache? I've only got a small number of files on this test HDD at the moment as the rest are all on my reiserFS drives from an unRAID basic install.