Hii !!!
i buy dns 320l from a***mazon and i configured initially whith a single hard drive 500 gb Hitachi HDP725050GLA360. After formatting by nas i used an external hard drive for download media file, and the disk is visible on lan whit Z: letter. After i have installed a second hard drive SeagateST1000DM003-1CH1. This drive i formattede by system and i set standard mode for each drive. I view is possible use jbod mode. In this case the system necessary format my hard drive? thanks for help and excuse me for bad english i'm italian.....