HTPC is an entertainment PC movies music and such! If you thinking mass storage would be NAS server. http://en.wikipedia.org/wiki/Network-attached_storage
I get that....but a home theatre pc needs space for its movies and music....1x 3.25 drive isnt enough. like a htpc case with like 3 drive bays seems like it should be a minimum requirment. I want to build an htpc have one drive for boot... the other 2 for jbod setup storage for movies and music.
having a 1x 3.25 drive bay only gives a maximum of 3TB i think? without the use of external HDDs via usb. most htpc cases also only have 1x5.25 drive bay for optical disks drives so there would be no way to say use a 5.25 to 3.25 bay adapter for an extra drive cage.