QNAP TDS-h2489FU-4309Y-64G-US  - NVMe all-flash ZFS storage, featuring the innovative dual 2 x Intel® Xeon® Silver 4309Y 8-core/16-thread processor, up to 3.6 GHz  64-and 64 GB RDIMM DDR4 ECC (8 x 8 GB), 32 x RDIMM DDR4 ECC (16 x slots per socket) supported with 24 U.2 NVMe Gen 4 x4 SSD bays, the QNAP’s flagship NVMe all-flash storage TDS-h2489FU delivers high random read/write IOPS for tackling I/O-intensive and latency-sensitive applications. (Supports QuTS hero or QTS operating system) the TDS-h2489FU meets your requirements for modern data centers, virtualization, and mission-critical backup/restore tasks.

Product Features

  • System: NVMe all-flash ZFS storage (Supports QuTS hero or QTS operating system)
  • Processor: Dual 2 x Intel® Xeon® Silver 4309Y 8-core/16-thread processor, up to 3.6 GHz
  • Connectivity Ports: 4 (2.5G/1G/100M/10M) - 2 x 25GbE SFP28 SmartNIC port
  • 10 Gigabit Ethernet Port: 2 x 10GBASE-T (10G/1G)
  • M.2 SSD Slot: 2 x M.2 2280 NVMe PCIe Gen 3 x2 or SATA 6Gb/s
  • Drive Bay: 24 x 2.5-inch U.2 & U.3 SSD
  • Model: Diskless (No drives)

Availability: Available
Sku: TDS-h2489FU-4309Y-64G


CPU 2 x Intel® Xeon® Silver 4309Y 8-core/16-thread processor, up to 3.6 GHz
CPU Architecture 64-bit x86
Encryption Engine  (AES-NI)
System Memory 64 GB RDIMM DDR4 ECC (8 x 8 GB)
Memory Slot 32 x RDIMM DDR4 ECC (16 x slots per socket)
Flash Memory 5GB (Dual boot OS protection)
Drive Bay 24 x 2.5-inch
The system is shipped without SSD.
For the SSD compatibility list, please visit https://www.qnap.com/compatibility/
Drive Compatibility 2.5-inch bays:
2.5-inch SATA hard disk drives (#17-24)
2.5-inch SATA solid state drives (#17-24)
2.5-inch U.2 NVMe PCIe Gen4 x4 solid state drives
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
SSD Cache Acceleration Support
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
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.
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) 3.48 × 17.57 × 28.08 inch
Weight (Net) 46.98 lbs
Weight (Gross) 60.85 lbs
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:
Power Consumption: Operating Mode, Typical 467.59 W
Tested with drives fully populated.
Fan 6 x 60mm, 12VDC
System Warning Buzzer
Max. Number of Concurrent Connections (CIFS) - with Max. Memory 10,000

 Featuring dual Intel® Xeon® Silver 4300 processors and 24 U.2 NVMe Gen 4 x4 SSD bays, the QNAP’s flagship NVMe all-flash storage TDS-h2489FU delivers high random read/write IOPS for tackling I/O-intensive and latency-sensitive applications. The ZFS-based QuTS hero operating system supports inline data deduplication and compression for reducing I/O and SSD storage consumption, which significantly extends SSD lifespan with a higher price-performance ratio for all-flash storage arrays. Coupled with near-unlimited snapshots, real-time SnapSync, and QSAL (QNAP SSD Antiwear Leveling), the TDS-h2489FU meets your requirements for modern data centers, virtualization, and mission-critical backup/restore tasks.

Optimized SSD performance and lifespan

Inline data deduplication and compression, Pool Over-provisioning, and TRIM maximize SSD performance and lifespan.

25GbE & 2.5GbE connectivity

Dual 25GbE SFP28 and quad 2.5GbE RJ45 high-speed connectivity accelerates virtualization, intensive file access, and large backup/restoration tasks.

High-speed PCIe Gen 4 slots

Allows for installing 10/25/40/100GbE adapters, QM2 cards, or Fibre Channel cards to increase application performance.

Virtualization applications

Supports virtualization storage and hosting virtual machines and containerized apps.


Cloud storage gateway

Realizes hybrid cloud applications by working with the cache space reserved on NAS to ensure low-latency data access to the cloud.

Flexible storage expansion

Scalable design to grow with your business by connecting SAS 12Gb/s expansion enclosures for up to petabyte-scale storage capacity.

Build high-performance storage infrastructure for IOPS-demanding applications


Eliminates storage bottlenecks for unstructured data and I/O intensive workloads; ideal for server virtualization and virtual desktop infrastructure (VDI).

Data Centers

Delivers ultra-low latency and high IOPS performance, providing response times within microseconds for data centers that host significant business-critical systems and data.

Media and Entertainment (M&E) production

Satisfies smooth 4K/8K media streaming and post-production, empowering multimedia workflows with faster data transfer, access, and backup for boosted efficiency.

Multiplied computing power with dual Intel Xeon Scalable processors and 8-channel DDR4 ECC memory

The TDS-h2489FU is powered by dual Intel® Xeon® Silver 4309Y 8-cores 2.8 GHz (up to 3.6 GHz) or Intel® Xeon® Silver 4314 16-cores 2.4 GHz (up to 3.4 GHz) processors, which are based on the new 3rd Gen Intel® Xeon® Scalable processors architecture that increases core performance, memory, I/O bandwidth, and features built-in workload and service acceleration. With 8-channel modules and 32 Long-DIMM slots, the TDS-h2489FU’s DDR4 memory can be upgraded up to 1 TB for fulfilling memory-intensive applications. Demonstrating immense computing power and multi-tasking capabilities, the TDS-h2489FU is outstanding for uncompromising performance demands in HPC, virtualization, file servers, and multimedia applications.

U.2 NVMe PCIe Gen 4 x4 – faster speed, optimal I/O, and lower latency

The 2U rackmount TDS-h2489FU has 24 drive bays for U.2 NVMe PCIe Gen 4 x4 SSDs that supply up to 64 Gb/s bandwidth (compatible with PCIe Gen 3 SSDs) for the utmost application response times. Coupled with powerful ZFS data deduction and SSD optimization technologies, the TDS-h2489FU provides solid foundations for overcoming performance demands while also maximizing your SSD investments! Among the 24 drive bays, slots 17 to 24 support both high-performance U.2 NVMe PCIe Gen 4 x4 SSDs or economical SATA 6Gb/s SSDs.

Dual 25GbE connectivity optimizes data transfer and VMware virtualization with iSER

The TDS-h2489FU provides four 2.5GbE RJ45 ports and has a built-in QXG-25G2SF-CX6 dual-port 25GbE SFP28 SmartNIC with the NVIDIA® Mellanox ConnectX®-6 Lx SmartNIC controller that supports iSCSI Extensions for RDMA (iSER) to increase performance of data transfer between NAS and ESXi server and offload CPU workloads. With Port Trunking and Auto-Negotiation, the TDS-h2489FU empowers your organization with the bandwidth and reliability to allow thousands of endpoint users to smoothly access data stored on the NAS and also satisfy the most demanding applications (including data centers, virtualization, massive file transfer, high-speed backup/restoration, and multimedia transmission). The TDS-h2489FU is also ideally matched with QNAP’s managed and unmanaged 2.5GbE/10GbE switches to form high-speed, secure and scalable network environments without going over budget.

M.2 PCIe/SATA slots for SSD cache acceleration or enhanced AI image recognition

To attain optimal I/O and reduce latency, you can configure SSD caching by using either 2.5-inch SSDs or two M.2 2280 SSDs (NVMe PCIe Gen 3 or SATA 6 Gb/s, sold separately) in the TDS-h2489FU. You can implement durable data center SSDs (such as Intel® Optane™ SSDs) to enhance ZIL protection along with the QuTS hero Dedicated ZIL – SLOG. Extra M.2 SSD slots can also be added by installing QM2 PCIe cards. The M.2 PCIe slots also allow for installing a Coral M.2 Accelerator with Edge TPU, providing an affordable solution to leverage AI acceleration for faster image recognition in your NAS applications.


QM2 - Upgrade your QNAP NAS Experience with M.2 SSD Caching and 10G in One Card

QM2 is designed specifically to upgrade your entry and mid-end QNAP NAS system! QNAP puts 2 M.2 SSD slots (SATA or PCIe NVMe) and one 10GBase-T network port into a single PCIe expansion card. Installed M.2 SSD sticks are covered by a giant heatsink as well as a smart fan for heat dissipation which ensure operational stability and longevity. With this PCIe expansion card, you can enable SSD Caching or auto tiering while populate all your NAS bays with high capacity HDD!

Application for QM2 SSD slots:

  1. Create a volume on these SSD and use them as extra storage
  2. Enable Read Cache
  3. Enable Read/Write Cache
  4. Enable Qtier feature
  5. Boost performance in case of memory swapping

What is Qbit?

Configured system orders start here!
The selected drives are batch controlled and tested using our HDD and SSD servers. Passed drives are then installed in the NAS with Volume and RAID set. Our pre-burn testing prepares the NAS with an initial system and drive testing cycle to ensure that the integrity of the entire system is tested and passed with no issues at all.

Our stress testing (burn-test) cycle commences for a minimum of 24 hours and extends to 48 hours if requested or required. This is undertaken in order to ensure stability when used in a normal environment. These tests can include extremes of workload (constant I/O's), CPU and memory use, thermal load (heat), clock speed, or voltages, bus and connectivity components, with the primary stress testing software aiming to test stability by trying to force a system to fail. Our tests put a greater emphasis on robustness, availability and error handling heavy loads.

Once the tests are complete we QA and pack the system back into it's retail box. Then it's double boxed to protect the unit during shipping. You receive your QNAP NAS Ready To Plug 'N' Store. It doesn't get any easier. Buy your NAS from the QNAP EXPERTS at QNAP DIRECT.