### QNAP 2U 18-Bay NAS: A Complete System with Integrated Controller The product SKU "QNAP QNAP 2U 18-B QTS HERO NAS/ISCSI IP-SAN/REG" refers to a complete and fully functional Network Attached Storage (NAS) system, not just an empty enclosure. This high-performance 2U rackmount unit comes with an integrated controller, processor, memory, and the pre-installed QNAP QuTS hero operating system. The specific model number associated with this description is the **TS-h1886XU-RP-R2-D1622-32G-US**. This model is designed for business and enterprise use, offering a robust solution for data storage, virtualization, and demanding applications. **Key Specifications:** - **Processor:** Intel Xeon D-1622 quad-core processor - **Memory:** 32 GB DDR4 ECC RAM (upgradeable) - **Drive Bays:** 18 total bays, typically configured with 12 front-loading 3.5-inch bays for high-capacity drives and 6 rear-accessible 2.5-inch bays for solid-state drives (SSDs) to be used for caching or high-speed storage tiers. - **Operating System:** QNAP's ZFS-based QuTS hero operating system, which provides advanced data protection and storage management features. - **Networking:** Multiple Gigabit and 10GbE SFP+ network ports for high-speed connectivity. - **Functionality:** Supports both NAS (file-level) and iSCSI IP-SAN (block-level) storage, making it a versatile solution for various network storage needs. In essence, the product is a self-contained server appliance that requires the addition of hard drives or SSDs to become operational. The "controller" functionality is an integral part of the NAS's mainboard and is powered by the onboard CPU and the QuTS hero software.