QNAP Systems (http://www.qnap.com) says Hitachi (Deskstar7K3000 HDS723030ALA640) and Seagate (Barracuda XT ST33000651AS) 3TB hard drives are now fully supported by the entire lineup of Intel-based and ARM-based Turbo NAS series.
QNAP users can now update the system firmware of Turbo NAS to version 3.4.0 or later version and use these high capacity hard drives to enjoy 24TB storage (8-bay desktop or rack-mounted models) for backup and storage of documents, multimedia files, and more. For more information about the hard disk compatibility list of QNAP Turbo NAS, go to http://www.qnap.com/pro_compatibility.asp .