24-bay all-flash rackmount NAS
QNAP TDS-h2489FU-R2-4314-256G All-Flash NAS
A 24-bay U.2 NVMe all-flash rackmount NAS with dual 16-core Intel Xeon Silver 4314 processors, 256GB DDR4 ECC memory and standard 25GbE connectivity.
Enterprise all-flash storage for low-latency workloads
The QNAP TDS-h2489FU-R2-4314-256G is a dual-processor, 24-bay all-flash NAS designed for virtualisation, data centres, AI and big-data storage, cloud applications and 3D rendering workstations. It combines U.2 NVMe storage, QuTS hero data services, PCIe Gen 4 expansion and redundant power supplies for demanding multitasking and data-growth requirements.
Key features and benefits
Dual Xeon processing
Two Intel Xeon Silver 4314 processors provide 16 cores and 32 threads each, with speeds up to 3.4GHz.
Expandable ECC memory
The supplied 256GB configuration uses 8 × 32GB DDR4 ECC RDIMMs and supports the stated maximum memory of 1TB.
U.2 NVMe all-flash design
Sixteen bays are dedicated to U.2 PCIe NVMe and eight accept U.2 PCIe NVMe or SATA 6Gbps SSDs.
25GbE supplied as standard
Two 25GbE SFP28 SmartNIC ports and four multi-speed 2.5GbE ports provide high-speed network connectivity.
PCIe Gen 4 expansion
Four PCIe slots support the supplied expansion options, including higher-speed network, Fibre Channel and storage cards.
QuTS hero data protection
The ZFS-based operating system provides immutable storage, snapshots, data deduplication and SSD optimisation.
Who is the QNAP TDS-h2489FU-R2-4314-256G best for?
A strong choice for
- Data centres and enterprise all-flash storage deployments
- Virtualisation infrastructure requiring low-latency storage
- AI and big-data storage workloads
- Cloud-based applications and high-load multitasking
- 3D rendering workstations and large collaborative data sets
Consider another model if you need
- A compact desktop or tower NAS
- A system that accepts 3.5-inch hard drives
- Memory capacity beyond the stated 1TB maximum
- A storage appliance with SSDs already included
Key specifications
- CPU
- 2 × Intel Xeon Silver 4314, 16-core/32-thread, up to 3.4GHz
- System memory
- 256GB RDIMM DDR4 ECC (8 × 32GB)
- Drive bays
- 24: 16 × U.2 PCIe NVMe; 8 × U.2 PCIe NVMe/SATA 6Gbps
- M.2 slots
- 2 × M.2 2280 NVMe PCIe Gen 3/SATA
- Networking
- 2 × 25GbE SFP28 SmartNIC; 4 × 2.5GbE RJ45
- PCIe slots
- 4 × PCIe Gen 4
- Dimensions
- 88.3 × 446.2 × 713.2 mm
- Net weight
- 22.77 kg
- Power supplies
- 2 × 1200W redundant PSU
- Standard warranty
- 5 (unit not stated in supplied source)
Full technical specifications
View all supplied technical specifications
| CPU | 2 x Intel® Xeon® Silver 4314 16-core/32-thread processor, up to 3.4 GHz |
|---|---|
| CPU Architecture | 64-bit x86 |
| Encryption Engine | (AES-NI) |
| System Memory | 256 GB RDIMM DDR4 ECC (8 x 32 GB) |
| Maximum Memory | 1 TB (32 x 32 GB) |
| Memory Slot | 32 x RDIMM DDR4 ECC (16 x slots per socket) |
| Flash Memory | 5GB (Dual boot OS protection) |
| Drive Bay | 24 (16 x 2.5-inch U.2 PCIe NVMe + 8 x 2.5-inch U.2 PCIe NVMe/SATA 6Gbps) The system is shipped without SSD. For the SSD compatibility list, please visit |
| Drive Compatibility | 2.5-inch bays: 2.5-inch SATA solid state drives (#17-24) 2.5-inch U.2 NVMe PCIe Gen4 x4 solid state drives |
| Hot-swappable | (Not supported M.2 SSD) |
| M.2 Slot | 2 Slot 1: M.2 2280 NVMe PCIe Gen 3 x4 or SATA 6Gb/s Slot 2: M.2 2280 NVMe PCIe Gen 3 x2 or SATA 6Gb/s Compatible with NVMe SSD PCIe Gen 3 and above. Please refer to for compatibility. |
| SSD Cache Acceleration Support | Supported |
| SR-IOV | Supported |
| 2.5 Gigabit Ethernet Port (2.5G/1G/100M) | 4 (2.5G/1G/100M/10M) |
| 25 Gigabit Ethernet Port | 2 x 25GbE SFP28 SmartNIC port |
| Wake on LAN (WOL) | Only the 2.5GbE port |
| Jumbo Frame | Supported |
| PCIe Slot | 4 Slot 1: PCIe Gen4 x16 or Gen4 x8* Slot 2: PCIe Gen4 x8 Slot 3: PCIe Gen4 x16 or Gen4 x8* Slot 4: PCIe Gen4 x8 *Slot 4 is preinstalled with a 25GbE network adapter. **Slot 1 provides the width of PCIe Gen4 x16 when Slot 2 is not in use, and provides the width of PCIe Gen4 x8 when Slot 2 is in use. **Slot 3 provides the width of PCIe Gen4 x16 when Slot 4 is not in use, and provides the width of PCIe Gen4 x8 when Slot 4 is in use. Card dimensions for PCIe slot 1:225 x 68.9 x 39.08 mm / 8.86 x 2.71 x 1.54 inches. Card dimensions for PCIe slot 2:225 x 68.9 x 18.76 mm / 8.86 x 2.71 x 0.74 inches. Card dimensions for PCIe slot 3:225 x 68.9 x 39.08 mm / 8.86 x 2.71 x 1.54 inches. Card dimensions for PCIe slot 4:225 x 68.9 x 18.76 mm / 8.86 x 2.71 x 0.74 inches. Wider cards can be installed if the next PCIe slot will not be used. |
| USB 3.2 Gen 1 port | 4 |
| Form Factor | Rackmount |
| LED Indicators | SSD, Status, Power, Fan, Temperaure, Power Module Status, Device Name, IP Address |
| Buttons | Power, Reset, OLED |
| Dimensions (HxWxD) | 88.3 × 446.2 × 713.2 mm |
| Weight (Net) | 22.77 kg |
| Weight (Gross) | 27.55 kg |
| Operating Temperature | 0 - 35°C (32°F - 95°F) |
| Storage Temperature | -20 - 70°C (-4°F - 158°F) |
| Relative Humidity | 5-95% RH non-condensing, wet bulb: 27°C (80.6°F) |
| Power Supply Unit | 1200W PSU(x2), 100-240Vac Max Wattage: 1200W@200-240Vac 1000W@100-127Vac |
| Power Consumption: Operating Mode, Typical | 467.59 W Tested with drives fully populated. |
| Fan | 6 x 60mm, 12VDC |
| System Warning | Buzzer |
| Standard Warranty | 5 |
| Max. Number of Concurrent Connections (CIFS) - with Max. Memory | 10,000 |
Frequently asked questions about the QNAP TDS-h2489FU-R2-4314-256G
What is the QNAP TDS-h2489FU-R2-4314-256G?
The QNAP TDS-h2489FU-R2-4314-256G is a 24-bay U.2 NVMe all-flash rackmount NAS with dual Intel Xeon Silver 4314 processors and 256GB ECC memory.
How much memory is included?
This configuration includes 256GB of DDR4 ECC RDIMM memory as 8 × 32GB modules. The supplied maximum memory is 1TB.
Which SSDs fit the 24 drive bays?
Bays 1–16 accept 2.5-inch U.2 NVMe PCIe Gen 4 x4 SSDs. Bays 17–24 accept the supplied 2.5-inch SATA SSD or U.2 NVMe options.
Are SSDs included with the QNAP TDS-h2489FU-R2-4314-256G?
No. The supplied specification states that the system ships without SSDs.
Which network ports are included?
It includes two 25GbE SFP28 SmartNIC ports and four RJ45 ports supporting 2.5G, 1G, 100M and 10M speeds.
How many PCIe expansion slots are available?
The QNAP TDS-h2489FU-R2-4314-256G has four PCIe Gen 4 slots. The supplied specification notes that slot 4 is preinstalled with a 25GbE network adapter.
Which operating system does this NAS use?
The supplied description identifies the ZFS-based QuTS hero operating system.
What warranty value is supplied?
The source specification lists the standard warranty as 5 but does not state the unit, so the unit has not been inferred here.
