- Features
- Specification
- Features
- Specification
- Features
- Specification
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 2027) , ideal for businesses requiring matching NAS models deployed for long-term projects.
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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.
PB-level storage expansion
The TS-855eU can scale its storage capacity to meet growing business needs. By flexibly connecting multiple QNAP expansion enclosures you can easily attain petabyte-scale storage capacity.
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.
Available Models
TS-855eU-RP-8G
Intel ® Atom® C5125 8-core processor, 2.8GHz, 8 GB non-ECC SODIMM DDR4 (1 x 8 GB), redundant power supply
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: Purchase the optional RAIL-B02 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
8 GB DDR4 memory (up to 64 GB, 2x 32 GB)
Note: Supports ECC RAM (cannot be used with non-ECC RAM)
Transmission efficiency
Windows File Transfer (2x 2.5GbE)
Download
MB/s
Upload
MB/s
Windows File Transfer with Encryption (2 x 2.5GbE)
Download
MB/s
Upload
MB/s
SMB Sequential Throughput 1MB (2 x 25GbE)
Read
MB/s
Write
MB/s
Tested in QNAP Labs. Figures may vary by environment.
Test Environment:
NAS: TS-855eU with QXG-25G2SF-CX6
OS : QTS 5.0.1
Volume type: 8 x Samsung 860 EVO 1 TB SATA , RAID 5, thick volume
Client PC: Windows Server 2016 Standard, Intel i7-6700 3.4GHz, 64GB RAM
IOmeter: 16MB, 30-sec ramp up time, 3-min seq. run time, 16 workers, 4-outstanding
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.
Learn More: QNAP 2.5GbE solutions, QNAP Switch family
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.
2 x NVMe Gen 3 x4 M.2 2280 SSD Slots
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.
Learn More: SSD cache acceleration, QNAP SSD Technology
Auto Tiering
Qtier™ technology empowers the TS-855eU with auto tiering to continuously optimize storage efficiency across all installed storage devices.
Learn More: Qtier auto-tiering
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).
Learn More: QNAP network expansion cards
QM2 card
Add M.2 SSDs or 2.5GbE/10GbE connectivity to the TS-855eU for optimized performance and bandwidth.
Learn More: QM2 card
SAS / SATA storage expansion cards
Connect the TS-855eU to SAS 12Gb/s or SATA 6Gb/s expansion units for petabyte-scale storage capacity.
Learn More: QNAP storage expansion cards, Compatible expansion enclosures
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.
Learn More: QNAP NAS supports Fibre Channel SAN, QNAP Fibre Channel cards
Simple Backup
Superior hardware performance with an all-in-one Backup Solution to speed up backup/recovery tasks.
Back up all your devices
Sync your computer files to NAS with Qsync. TS-855eU also supports Time Machine for Mac computers.
Back up multiple VMware® and Hyper-V™ VMs using Hyper Data Protector.
Supports multiple protocols such as Rsync, FTP and CIFS for backing up different file servers.
Use Boxafe to easily back up Google™ Workspace and Microsoft 365® business account data.
The exclusive MARS service enables backing up Google Photos and WordPress databases and files to NAS.
Remote Replication for NAS data
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.
Hybrid Backup Sync supports mainstream public cloud services for backing up or syncing data from NAS to Cloud.
VJBOD Cloud connects cloud object storage (Bucket) and back up data from NAS to the cloud.
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.
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.
Learn More: Virtualization Station, QuTScloud on hypervisors
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.
Learn More: Container 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.
Learn More: Linux Station
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 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.
Learn More: QuTScloud for private cloud
Comprehensive security and privilege settings
The TS-855eU is loaded with flexible privilege settings and security measures. Besides IP blocking, 2-step verification, HTTPS connection, there are more apps that help ensure optimal NAS protection against threats like malware and hackers.
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.
Learn More: myQNAPcloud service
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.
Supports IPv6, firewall access lists, and GeoIP filtering to restrict access based on geographical locations for higher NAS network security.
Learn More: QuFirewall
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.
Learn More: QVPN
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.
Learn More: QuWAN
A security portal for the TS-855eU to check for weaknesses and offer recommendations for enhancing NAS security. It also integrates anti-virus and anti-malware scanning software.
Learn More: Security Counselor
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.
Learn More: Malware Remover
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.
Learn More: TeamViewer
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 NAS and view snapshots files – all from your web browser. You can also easily mount remote NAS folders and cloud storage.
Learn More: File Station
Qsync
Make any file uploaded to a NAS 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.
Learn More: Qsync
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.
Learn More: Qsirch
Qfiling
Learn More: Qfiling
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
Subscription-based
Monthly US $1.99 /channel
Mobile app
QVR Pro Client and mobile app
Total camera channels
Scalable with optional licenses
Video format
MP4
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 TVS-h874 storage as needed to accommodate data and business growth.
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 to expand the capacity of the TS-855eU while also centrally managing files on the NAS, cloud storage, and remote devices.
Install your NAS hard drives into a larger QNAP NAS and retain all your existing data and configurations.
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!
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.
Consolidates all system events, alerts, and notifications for smooth and easy NAS management, keeping you always informed of your NAS status.
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.
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.
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.
Learn More: DA Drive Analyzer
When using supported IronWolf™ or IronWolf Pro™ hard drives, overall system reliability is improved by providing you with actionable prevention, intervention, and recovery options.
Learn More: IHM
Flexibly switch to QTS operating system
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 performance-demanding tasks, 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.
Extend hardware warranty up to 5 years
The TS-855eU is backed by a 3-year warranty at no additional cost. You can also purchase a warranty extension that extends your warranty coverage up to 5 years.
