24-Bay Dual-Xeon All-Flash NAS
QNAP TDS-H2489FU-4314-256G All-Flash NAS
A 24-bay U.2 NVMe all-flash NAS with two Intel Xeon Silver 4314 16-core processors, 256 GB DDR4 ECC memory, dual 25GbE SFP28, four 2.5GbE ports and two PCIe Gen 4 slots.
High-bandwidth all-flash storage with 256 GB ECC memory
The QNAP TDS-H2489FU-4314-256G provides 24 U.2 NVMe-capable bays, two Intel Xeon Silver processors, 256 GB ECC memory and dual 25GbE networking. QuTS hero data reduction and protection features, virtualisation support, cloud storage gateways and SAS expansion suit modern data centres, intensive file access and mission-critical backup and recovery.
Key features and benefits
Twenty-four all-flash bays
Sixteen bays support U.2 NVMe SSDs and eight bays support U.2 NVMe or SATA SSDs.
Dual 16-core Xeon processors
Two Intel Xeon Silver 4314 processors provide 32 threads each and a stated speed up to 3.4 GHz.
256 GB ECC memory
The installed 256 GB RDIMM DDR4 ECC configuration has a stated maximum capacity of 1 TB.
Dual 25GbE SmartNIC ports
Two 25GbE SFP28 ports and four 2.5GbE RJ45 ports support intensive file and backup traffic.
ZFS-based QuTS hero
Inline deduplication, compression, snapshots, real-time SnapSync and QSAL support storage efficiency and data protection.
Flexible high-speed expansion
Two PCIe Gen 4 slots support compatible networking, QM2 and Fibre Channel cards, with stated SAS enclosure expansion.
Who is this model best for?
A strong choice for
- U.2 NVMe all-flash arrays
- Virtualisation storage and hosted virtual machines
- High-bandwidth file access
- Large backup and restoration tasks
- Hybrid-cloud and data-centre storage
Consider another model if you need
- You require 3.5-inch hard-drive bays
- You need more than 256 GB memory installed initially
- You need a compact or short-depth chassis
Key specifications
- Processor
- 2 × Intel Xeon Silver 4314, 16-core/32-thread each, up to 3.4 GHz
- System memory
- 256 GB RDIMM DDR4 ECC (8 × 32 GB)
- Maximum memory
- 1 TB (32 × 32 GB)
- Drive bays
- 24 total: 16 × U.2 NVMe + 8 × U.2 NVMe/SATA
- Drive compatibility
- 2.5-inch U.2 NVMe PCIe Gen 4 x4 SSD; 2.5-inch SATA SSD in bays 17–24
- M.2 slots
- 2 × M.2 2280 NVMe/SATA
- Networking
- 2 × 25GbE SFP28 SmartNIC; 4 × 2.5GbE RJ45
- Expansion
- 2 × PCIe Gen 4 slots
- Dimensions
- 88.3 × 446.2 × 713.2 mm
- Power supply
- 1200W × 2, 100–240Vac
Full technical specifications
Processor, memory and storage
| CPU | 2 x Intel® Xeon® Silver 4314 16-core/32-thread processor, up to 3.4 GHz |
|---|---|
| CPU Architecture | 64-bit x86 |
| Encryption Engine | Supported (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. |
| 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 | Supported (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 |
| Max. Number of Concurrent Connections (CIFS) - with Max. Memory | 10,000 |
Network, ports and expansion
| 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) | Supported Only the 2.5GbE port |
| Jumbo Frame | Supported |
| PCIe Slot | 2 Slot 1: PCIe Gen4 x16 Slot 2: PCIe Gen4 x8 *Slot 2 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. 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. Wider cards can be installed if the next PCIe slot will not be used. |
| USB 3.2 Gen 1 port | 4 |
Physical, environmental and power
| Form Factor | 2U 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 |
Frequently asked questions about the TDS-H2489FU-4314-256G
What is the QNAP TDS-H2489FU-4314-256G?
It is a 24-bay U.2 NVMe all-flash rackmount NAS with dual Xeon Silver processors, 256 GB ECC memory and dual 25GbE networking.
Which processor does the TDS-H2489FU-4314-256G use?
The TDS-H2489FU-4314-256G uses two Intel Xeon Silver 4314 processors, each with 16 cores, 32 threads and a stated speed up to 3.4 GHz.
How much memory is included with the TDS-H2489FU-4314-256G?
The TDS-H2489FU-4314-256G includes 256 GB RDIMM DDR4 ECC memory as eight 32 GB modules and supports a stated maximum of 1 TB.
How many drive bays does the TDS-H2489FU-4314-256G have?
It has 24 bays: 16 for U.2 NVMe SSDs and eight for U.2 NVMe or SATA SSDs.
Which drive types are supported by the TDS-H2489FU-4314-256G?
It supports 2.5-inch U.2 NVMe PCIe Gen 4 x4 SSDs, with 2.5-inch SATA SSD support in bays 17–24.
Which network ports are built into the TDS-H2489FU-4314-256G?
It includes two 25GbE SFP28 SmartNIC ports and four 2.5GbE RJ45 ports.
What expansion options does the TDS-H2489FU-4314-256G provide?
It provides two M.2 2280 slots and two PCIe Gen 4 slots; PCIe slot 2 is preinstalled with the 25GbE network adapter.
What form factor is the TDS-H2489FU-4314-256G?
It is a 2U rackmount all-flash NAS with redundant power supplies.
What are the dimensions of the TDS-H2489FU-4314-256G?
Its stated dimensions are 88.3 × 446.2 × 713.2 mm.
Does the TDS-H2489FU-4314-256G support SR-IOV?
Yes. SR-IOV support is listed in the technical specifications.
Important information
The system is shipped without SSDs.
M.2 SSDs are not hot-swappable.
PCIe slot 2 is preinstalled with the 25GbE network adapter.
The stated 467.59 W operating figure was tested with drives fully populated.
