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Description
Overview
TS-855eU
2U short-depth rackmount NAS with 8-core computing power for optimized virtualization
Designed for flexible IT deployment and comprehensive virtualization applications, the short-depth TS-855eU 2.5GbE NAS can easily fit in a compact rack in offices or audiovisual rooms. Powered by an Intel® 8-core processor, the TS-855eU packs excellent performance and computing benefits to empower fast data access, backup/restoration, file server, and virtualization applications. Running the QTS operating system as standard, the TS-855eU can be switched to use the ZFS-based QuTS hero operating system based on your requirements. The TS-855eU will be available and supported by QNAP for an extended period (up to 2030) , ideal for businesses requiring matching NAS models deployed for long-term projects.
Compact, space saving
The TS-855eU has a depth of only 11.7 inches (297.4 mm) and is perfectly suited for installation in a compact rack, or places with a lot of cabling.
Flexible storage expansion
Connect TL-R1620Sep-RP / TL-R1220Sep-RP JBOD units to the TS-855eU for adding up to 48 additional drive capacity to match your business growth.
Dual 2.5GbE connectivity
Features two 2.5GbE ports (backwards compatible with 1G/100M). Supports port trunking for enhanced performance and fault tolerance.
PCIe expandability
Features two PCIe Gen 3 slots for installing 5/10/25GbE network cards, QM2 cards or Fibre Channel cards.
Optimized SSD performance
Dual M.2 PCIe NVMe slots enable SSD caching or SSD storage pool for the system drive of QuTS hero.
Virtual machines and containers
Centralize your virtualization storage, and host multiple virtual machines and containerized apps.
TS-855eU
2U short-depth rackmount NAS with 8-core computing power for optimized virtualization
Designed for flexible IT deployment and comprehensive virtualization applications, the short-depth TS-855eU 2.5GbE NAS can easily fit in a compact rack in offices or audiovisual rooms. Powered by an Intel® 8-core processor, the TS-855eU packs excellent performance and computing benefits to empower fast data access, backup/restoration, file server, and virtualization applications. Running the QTS operating system as standard, the TS-855eU can be switched to use the ZFS-based QuTS hero operating system based on your requirements. The TS-855eU will be available and supported by QNAP for an extended period (up to 2030) , ideal for businesses requiring matching NAS models deployed for long-term projects.
Compact, space saving
The TS-855eU has a depth of only 11.7 inches (297.4 mm) and is perfectly suited for installation in a compact rack, or places with a lot of cabling.
Flexible storage expansion
Connect TL-R1620Sep-RP / TL-R1220Sep-RP JBOD units to the TS-855eU for adding up to 48 additional drive capacity to match your business growth.
Dual 2.5GbE connectivity
Features two 2.5GbE ports (backwards compatible with 1G/100M). Supports port trunking for enhanced performance and fault tolerance.
PCIe expandability
Features two PCIe Gen 3 slots for installing 5/10/25GbE network cards, QM2 cards or Fibre Channel cards.
Optimized SSD performance
Dual M.2 PCIe NVMe slots enable SSD caching or SSD storage pool for the system drive of QuTS hero.
Virtual machines and containers
Centralize your virtualization storage, and host multiple virtual machines and containerized apps.
| QNAP TS-855eU-8G Specifications | |
|---|---|
| CPU | Intel ® Atom® C5125 8-core processor, 2.8GHz |
| CPU Architecture | 64-bit x86 |
| Floating Point Unit | ✓ |
| Encryption Engine | ✓(AES-NI) |
| System Memory | 8 GB non-ECC SODIMM DDR4 (1 x 8 GB) |
| Maximum Memory | 64 GB ( 2 x 32 GB) |
| Memory Slot | 2 x SODIMM DDR4 Support ECC memory For dual-DIMM configuration, you must use a pair of identical DDR4 modules.
|
| Flash Memory | 5GB (Dual boot OS protection) |
| Drive Bay | 8 x 3.5-inch SATA 6Gb/s, 3Gb/s
The system is shipped without HDD.
For the HDD compatibility list, please visit https://www.qnap.com/compatibility/ |
| Drive Compatibility | 3.5-inch SATA hard disk drives 2.5-inch SATA hard disk drives 2.5-inch SATA solid state drives |
| Hot-swappable | ✓(Not supported M.2 SSD) |
| M.2 Slot | 2 x M.2 2280 (PCIe Gen 3 x 4)
Compatible with NVMe SSD PCIe Gen 3 and above. Please refer to https://www.qnap.com/compatibility/ for compatibility.
|
| SSD Cache Acceleration Support | ✓ |
| SR-IOV | ✓ |
| 2.5 Gigabit Ethernet Port (2.5G/1G/100M) | 2 (2.5G/1G/100M/10M) |
| 5 Gigabit Ethernet Port (5G/2.5G/1G/100M) | Optional via a network adapter |
| 10 Gigabit Ethernet Port | Optional via a network adapter |
| 25 Gigabit Ethernet Port | Optional via a network adapter |
| Wake on LAN (WOL) |
Only the 2.5GbE port
|
| Jumbo Frame | ✓ |
| PCIe Slot | 2 x PCIe Gen3 (x4) Slot 1: PCIe Gen 3 (x4) Slot 2: PCIe Gen 3 (x4) Card dimensions for PCIe slot 1:97 x 68.9x 18.76 mm / 3.82 x 2.71 x 0.74 inches.
Card dimensions for PCIe slot 2:210 x 68.9 x 18.76 mm / 8.27 x 2.71 x 0.74 inches. |
| USB 3.2 Gen 1 port | 4 |
| HDMI™ Output | Optional via a PCIe graphics card |
| Form Factor | 2U Short Depth Rackmount |
| LED Indicators | HDD 1-8, Status, LAN, USB, Power |
| Buttons | Power, Reset |
| Dimensions (HxWxD) | 88.6 × 432 × 297.4 mm |
| Weight (Net) | 8.1 kg |
| Weight (Gross) | 9.6 kg |
| Operating Temperature | 0 - 40 °C (32°F - 104°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 | 250W PSU, 100 - 240V |
| Power Consumption: Disk Standby Mode | 49.799 W |
| Power Consumption: Operating Mode, Typical | 79.113 W
Tested fully populated with WD10EFRX hard drives.
|
| Fan | 3 x 60mm, 12VDC |
| System Warning | Buzzer |
| Standard Warranty | 3 |
| Max. Number of Concurrent Connections (CIFS) - with Max. Memory | 2500 |





