QDA-A2AR Use two 2.5-inch SATA drives in a single 3.5-inch SATA drive bay with RAID support for PC and NAS The QDA-A2AR can accommodate two 2.5-inch SATA drives within a single 3.5-inch SATA drive bay. No software driver is required for the QDA-A2AR, and it can be installed in a PC/workstation (Windows®, Linux®) or QNAP NAS to flexibly add additional hard drives or SSDs to meet various storage needs. Features: Use two 2.5-inch SATA HDDs/SSDs (7mm to 9.5mm high) in a single 3.5-inch drive bay. (HDD/SSD sold separately) Up to 6 Gb/s file transfer speeds. Can be the primary bootable device for PCs. Choose a hardware RAID group with the disk mode switch. Specifications: Minimum operating system requirements QNAP NAS: QTS 4.4.1 and later Windows: Windows 7 and later, Windows Server 2012 R2 and later Linux Software Utility Features QNAP External RAID Manager Overview device, disks, and RAID info and status Support for disk’s S.M.A.R.T. monitoring Desktop notification to inform abnormal status