QNAP TS-855eU-8G Business Intel 8 Core Upto 2.8 GHz 2U 8-Bay Rckmount NAS Server,

QNAP TS-855eU-8G Business Intel 8 Core Upto 2.8 GHz 2U 8-Bay Rckmount NAS Server,

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, SSD storage pools, or Qtier™ auto-tiered storage.
Virtual machines and containers
Centralize your virtualization storage, and host multiple virtual machines and containerized apps.


2U short-depth design for up to 38% reduction in size
The rackmount TS-855eU has a short depth design of only 11.7 inches (297.4 mm), making it an excellent choice for smaller racks, wall-mount AV rack cabinets, and network rack cabinets. The space saved by the short depth design can be reserved for cabling or ventilation. The TS-855eU is space-saving for flexible deployment and is especially suitable for compact offices, audiovisual rooms, and security surveillance recording.
Note: Users can purchase the optional RAIL-S01 short rail kit to deploy the TS-855eU in a 19-inch rack following the ANSI/EIA-RS-310-D standard.


Ultimate 8-core performance with up to 64 GB RAM and Intel® QuickAssist Technology
Designed for heavy business workloads, the TS-855eU delivers exceptional 8-core performance for running multiple concurrent tasks. AES-NI encryption and Intel® QuickAssist Technology (QAT) is supported to offload computationally-intensive compression and improving IPsec/SSL cryptography performance. Up to 64 GB ECC RAM is supported. Combining high performance, reliability, and capacity, the TS-855eU is an all-round budget-friendly storage solution for diverse applications, such as file servers, high-speed storage/backup/recovery, and virtualization.
CPU
Intel® Atom® C5125 8 core 2.8 GHz processor
Memory
8GB DDR4 non-ECC memory (up to 64GB, 2x 32GB)
Note: Supports ECC RAM (cannot be used with non-ECC RAM)


Virtualization Certifications Supported by TS-855eU


Affordable 2.5GbE meets high-bandwidth demands
With two 2.5GbE RJ45 LAN ports (backwards compatible with 1G/100M), the TS-855eU allows businesses to easily upgrade network speeds from 1 Gigabit to 2.5 Gigabit using existing CAT5e cables. Port Trunking and failover also reinforce applications demanding higher bandwidth and reliability, including virtualization, large file transfers, high-speed backup/restoration, and real-time applications. QNAP also offers numerous managed/unmanaged 2.5GbE/10GbE switches, assisting organizations in implementing high-speed, secure, and scalable network environments without going over budget.


M.2 PCIe slots for SSD caching and accelerated AI-powered image recognition
The TS-855eU comes with two M.2 PCIe Gen 3 slots that allow for installing M.2 2280 NVMe SSDs or Edge TPU (sold separately) to boost NAS performance.
SSD caching
Configure SSD caching with M.2 SSDs and obtain optimal I/O and reduced latency without occupying any 3.5-inch drive bays.
Auto Tiering
Qtier™ technology empowers the TS-855eU with auto tiering to continuously optimize storage efficiency across all installed storage devices.
Faster image recognition with Edge TPU
Coral M.2 Accelerator with Edge TPU provides an affordable solution to leverage AI acceleration for faster image recognition in your NAS applications. (Purchase from the Coral website)


Abundant I/O capabilities with PCIe expansion
The TS-855eU has two PCIe Gen 3 x4 slots that allow for installing various expansion cards for expanding application potential.
5/10/25GbE network card
Enable lightning-fast throughput for bandwidth-demanding tasks (virtualization, mass data transmission, and fast backup/restore).


QM2 card
Add M.2 SSDs or 2.5GbE/10GbE connectivity to the TS-855eU for optimized performance and bandwidth.


SAS / SATA storage expansion cards
Connect the TS-855eU to SAS 12Gb/s or SATA 6Gb/s expansion units for petabyte-scale storage capacity.


Build an affordable Fibre Channel SAN environment
Common Fibre Channel Storage Area Networks (SAN) devices are often costly. By installing QNAP dual-port 16Gb /32Gb Fibre Channel expansion cards in the TS-855eU, you have more budget-friendly options to add a NAS to a SAN environment. You can set a Fibre Channel Target using the iSCSI & Fibre Channel app. Moreover, the LUN Masking and Port Binding features provide an additional layer of data security.


Simple Backup
Superior hardware performance with an all-in-one Backup Solution to speed up backup/recovery tasks.
Back up all your devices
PC and Mac backup
Sync your computer files to NAS with Qsync. TS-855eU also supports Time Machine for Mac computers.


License-free VM backup
Back up multiple VMware® and Hyper-V™ VMs using Hyper Data Protector.


File server backup
Supports multiple protocols such as Rsync, FTP and CIFS for backing up different file servers.


SaaS Business Backup Solution
Use Boxafe to easily back up Google™ Workspace and Microsoft 365® business account data.


Google Photos and WordPress backup
The exclusive MARS service enables backing up Google Photos and WordPress databases and files to NAS.


Remote Replication for NAS data
Back up data from one NAS to another NAS
Back up data on a local NAS to another remote NAS using Hybrid Backup Sync. You can also deduplicate your backup using QuDedup to save time and storage space.


Back up NAS data to the Cloud
Hybrid Backup Sync supports mainstream public cloud services for backing up or syncing data from NAS to Cloud.


Cloud Storage Gateway
VJBOD Cloud connects cloud object storage (Bucket) and back up data from NAS to the cloud.


Back up NAS snapshots
Use Snapshot Replica to back up NAS snapshots to another NAS and recover when needed.


Multi-version snapshots mitigate ransomware threats
The TS-855eU supports block-based snapshots that record the state of the system at any time. It helps protect data, which can be restored back to a specific point of time, greatly helping in mitigating the threat of ransomware.
Volume and LUN snapshots
Take snapshots in seconds and revert the entire volume/LUN back to a specific point in time to prevent loss of important data.
Instantly restore snapshots
Snapshot content can be quickly restored to a local NAS, or restored on a folder/file basis to a local/remote NAS or cloud storage. You can also conveniently view and restore snapshots from the client side.
Back up snapshots
Multiply data protection by backing up snapshot files! Replicate volume/LUN snapshots in the TS-855eU to a remote NAS (Snapshot Replica) by copying only the changes made. This helps save time & bandwidth, and can be run manually or on a scheduled basis.


Reliable, high-performance storage for virtualization
The TS-855eU supports block-based iSCSI LUN as a reliable, high-performance, and affordable storage solution for mainstream virtualization environments. It supports VMware® VAAI and Microsoft® ODX to increase performance by offloading server loading for ESXi server and Hyper-V respectively.


All-in-one solution for hosting virtual machines and containers
By running multiple virtual machines and containers on the TS-855eU, you can deploy multi-tenant environments and applications to increase management efficiency and save hardware costs. Coupled with the Network & Virtual Switch app that boosts interoperability between virtual machines, containers, QNAP NAS, and other physical devices on the network, you can flexibly allocate physical and virtual network resources to simplify network deployment.
Virtualization Station
Run multiple Windows®, Linux®, UNIX®, Android™, and QuTScloud virtual machines and access them via a web browser or Virtual Network Computing (VNC). Businesses can run virtualized server applications on a single NAS without needing additional physical servers.
Container Station
Experience Docker®, LXD, and Kata Containers lightweight virtualization technologies, download apps from the built-in Docker Hub Registry®, import/export containers, and create abundant microservices.
Linux Station
Run Linux® applications (including apps from the Software Center) directly on the NAS and remotely access the Linux® desktop from a web browser. The open-source Linux® platform is also ideal for Internet of Things development.
Single Root I/O Virtualization (SR-IOV)
By installing an SR-IOV compatible PCIe SmartNIC in the TS-855eU, you can allocate bandwidth resources from a physical network card directly to VMs, increasing network efficiency and reduced CPU overheads.
Note: SR-IOV is supported by specific QNAP NAS models and should work with SR-IOV compatible adapters. Click here to check compatibility.
QuTScloud virtual NAS
QuTScloud is a virtual appliance based on the QTS operating system. Enterprises can quickly launch QuTScloud on hypervisors including Linux® KVM, Microsoft® Hyper-V, and VMware ESXi™ to acquire advanced NAS features without requiring additional NAS hardware.

Comprehensive security and privilege settings
The TS-855eU is loaded with flexible privilege settings and security measures. Besides IP blocking, QNAP Authenticator, HTTPS connection, there are more apps that help ensure optimal NAS protection against threats like malware and hackers.
myQNAPcloud secures remote access
myQNAPcloud allows convenient connection to the TS-855eU through the Internet without any complex DDNS settings. To ensure your remote access service is secure, myQNAPcloud strengthens keys on SSL Certificates to 2048-bits.
Simplified privilege settings
The TS-855eU supports comprehensive access right settings for shared folders, Azure Active Directory Domain Services (Azure AD DS), LDAP, and Windows ACL to help IT staff efficiently manage user accounts and access rights for multiple NAS systems.
QuFirewall protection
Supports IPv6, firewall access lists, and GeoIP filtering to restrict access based on geographical locations for higher NAS network security.
Superior security with QVPN
A virtual private network (VPN) allows secure access to network resources and services across public networks. QVPN supports creating a VPN client, using the TS-855eU as a VPN server, and WireGuard® VPN service with an easy-to-use interface for setting up a secure connection.
QuWAN SD-WAN
To facilitate digital transformation, multi-site expansion and remote working, QuWAN SD-WAN helps automatically mesh multi-site VPN. It features IPsec encryption and cloud-centric management, allowing secure multi-site network including QNAP NAS and VMware ESXi platforms.
Security Center
A security portal for the TS-855eU to proactively detect NAS status, unusual file activity and potential security threats – offering instant protective measures against vulnerabilities to safeguard your system and data.
Malware Remover
Regularly scan your TS-855eU using the latest malware definitions. If infected files are detected, they will be immediately removed to ensure NAS data security.
TeamViewer remote access
TeamViewer app enables remote management and connectivity to multiple NAS devices from Windows® PCs with an unparalleled level of safety, while increasing IT efficiency and end user productivity.

The best file storage and collaboration center
The TS-855eU integrates rich apps for storing, managing, synchronizing, searching, and archiving files. It supports SMB/CIFS, AFP, and NFS protocols for streamlined file sharing across Windows®, Mac®, and Linux®/UNIX®, and provides the smartest NAS solution for professionally managing your files.
File Station
Manage, access, and share all the files in the TS-855eU and view snapshots files – all from your web browser. You can also easily mount remote NAS folders and cloud storage.


Qsync
Make any file uploaded to a TS-855eU available to linked devices, such as computers, laptops and mobile devices. You can sync shared folders and team folders for group file sharing to enhance the flexibility of team projects and collaboration.


Qsirch
QNAP’s powerful, Google-like search tool helps you quickly find images, music, videos, documents, and emails by keywords, color, and more search conditions. It also supports Qfiling to perform one-time or automatic archival tasks based on your search criteria.


Qfiling
Automate your file organization - all you need to do is categorize files, set a schedule, and Qfiling will do the rest. Qfiling also enables smart recycling that instantly moves filtered files to the Recycle Bin.


Short-depth Surveillance NAS - ideal video surveillance solution for factories
The short-depth TS-855eU is exceptionally suitable for wall mount rack cabinets or space-limited IT rooms, allowing production lines to maximize their space utilization. Enterprises can benefit from the TS-855eU as an all-in-one Surveillance NAS, designed with superb hardware performance and integrated QNAP surveillance software, and take advantages of its large capacity, high expandability, and high transmission efficiency for building the most cost-effective and reliable surveillance system in manufacturing facilities and factories.


Smart surveillance solution for 24/7 security
QVR Elite is QNAP’s subscription-based smart surveillance solution, allowing you to easily build a surveillance system with lower TCO and higher scalability. Recordings are saved as MP4 files, allowing playback on nearly every device. QVR Elite also integrates QNAP AI-based solutions to build smart facial recognition for retail and door access systems with QNAP NAS. You can arrange a dedicated, independent storage space for surveillance data on the TS-855eU and enjoy simplified camera management, storage space allocation, camera live viewing and playback.
Free embedded channels
2 IP camera channels
Total camera channels
Scalable with optional licenses
Video format
MP4
Mobile app
QVR Pro Client and mobile app
Scalable storage
NAS expansion units


Flexible and economical storage expansion
QNAP provides easy ways to expand your storage capacity. Here are several ways to expand your TS-855eU storage as needed to accommodate data and business growth.
Attach QNAP expansion enclosures
Connect expansion enclosures to the TS-855eU, and manage NAS storage expansion with the user-friendly Storage & Snapshots Manager app.
Mount cloud storage or remote file servers
Mount cloud storage or remote file servers to expand the capacity of the TS-855eU while also centrally managing files on the NAS, cloud storage, and remote devices.
Migrate to a new NAS
Install your NAS hard drives into a larger QNAP NAS and retain all your existing data and configurations.
Upgrade RAID capacity
Hot-swap lower-capacity drives with larger-capacity drives to expand your NAS capacity so it can grow with your business.

More productivity-boosting applications
The TS-855eU provides an App Center that includes feature-rich apps to expand your NAS potential!
QuObjects
Run a high-performance S3 compatible development environment on your TS-855eU to simplify service development workflows from testing to production. You can also move cold data from the cloud to an on-premises QuObjects to save cloud storage costs.


Notification Center
Consolidates all system events, alerts, and notifications for smooth and easy NAS management, keeping you always informed of your NAS status.


QuFTP
The TS-855eU can perform as an FTP server featuring SSL/TLS encryption, QoS bandwidth controls, and permission settings for efficiently and securely transferring large amounts of data. FTP Client is also supported.


A health check for your hard drives
Hard drives are at the heart of your NAS, and ensuring their long-term health and reliability is absolutely crucial. QNAP provides various methods and tools to help you monitor hard drive health, ensuring that you can take proactive decisions to safeguard your data and files.
S.M.A.R.T. and back block scanning
If any of the S.M.A.R.T. values are reported as abnormal, or bad blocks are detected, you can take early action and replace drives before potential data loss occurs.


DA Drive Analyzer
The DA Drive Analyzer leverages ULINK cloud-based AI to predict the expected lifespan of drives, assisting you in planning future drive replacements to protect against NAS downtime and data loss.


Seagate® IronWolf™ Health Management
When using supported IronWolf™ or IronWolf Pro™ hard drives, overall system reliability is improved by providing you with actionable prevention, intervention, and recovery options.


Switch to QuTS hero operating system for optimal data integrity and reliability
The TS-855eU also supports QuTS hero - QNAP’s ZFS-based NAS operating system. Providing end-to-end data integrity, data reduction (inline data deduplication, compression, and compaction), and much more, QuTS hero uses additional system resources to ensure an optimal environment for protecting business data.
QTS
Suited for cross-teams file sync, and HDD-SSD hybrid storage applications
QuTS hero
Featuring highly reliable data protection and data reduction, and optimized for SSD-based applications
1. QTS and QuTS hero use different file systems. You must remove all the drives from the TS-855eU before switching from QTS to QuTS hero.
2. QuTS hero requires a NAS with at least 8 GB memory.
3. Inline Data Deduplication requires a NAS with at least 16 GB memory (at least 32 GB memory is recommended for optimal performance).
4. It is recommended to create an SSD RAID with at least two SSDs for the QuTS hero system drive to attain optimal system performance. Please note that M.2 SSD hot-swapping is only supported by M.2 SSD slots on PCIe cards (such as the QM2). M.2 SSD slots that are built into the NAS do not support hot-swapping.

CPU
Intel ® Atom® C5125 8-core processor, 2.8GHz

CPU Architecture
64-bit x86

Floating Point Unit
Yes

Encryption Engine
Yes (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
Yes

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
Yes

SR-IOV
Yes

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)

Yes
Only the 2.5GbE port

Jumbo Frame
Yes

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: HDD Sleep 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

Max. Number of Concurrent Connections (CIFS) - with Max. Memory
2500