QNAP TS-855EU-8G NAS/storage server Rack (2U) Intel Atom® C5125 8 GB DDR4 0 TB QuTS hero Black

The QNAP TS-855EU-8G Rack 2U is a network-attached storage (NAS) appliance built for small and medium business environments. It is powered by an Intel Atom C5125 processor running at 2.8 GHz and equipped with 8 GB DDR4 memory, and runs the QuTS hero operating system for advanced ZFS-based data management and protection. The 2U rack chassis supports up to eight drives (HDD & SSD) and arrives without preinstalled drives, allowing flexible selection of storage capacities and media types. The unit includes Ethernet LAN connectivity, a black chassis and a compact 2U form factor suitable for server racks.

Advantages

The device provides enterprise-class data integrity and protection through QuTS hero and its ZFS foundations while keeping a low-power Intel Atom C5125 CPU for efficient performance. With support for up to eight drives, the NAS offers scalable storage expansion and RAID options to balance capacity, redundancy and performance. The 2U rack design and rack-mountable chassis enable straightforward integration into standard server cabinets. Weight and colour specifications make the unit easy to plan for physical installation and rack allocation.

Suitable for

• Small and medium-sized business file sharing and centralized storage
• Data protection and backup target with RAID configurations
• Virtualization storage for lightweight VMs or containers
• Media archive and project storage that requires mixed HDD and SSD support
• IT environments requiring rack-mounted, compact 2U hardware

Key specifications

• Model: QNAP TS-855EU-8G (MPN: TS-855eU-8G, EAN: 4711103083376)
• Processor: Intel Atom C5125, 2.8 GHz
• Memory: 8 GB DDR4 (installed)
• Drive bays supported: 8 (HDD & SSD); drives not preinstalled
• RAID: Supported (software/hardware RAID configurations via QuTS hero)
• Operating system: QuTS hero (ZFS-based storage OS)
• Chassis: Rack-mountable 2U, colour: Black
• Ethernet LAN: Yes (network connectivity supported)
• Weight: 7.61 kg

How to use

Install the unit in a standard 19-inch server rack occupying a 2U slot and secure it according to rack-mount instructions. Populate the drive bays with appropriate HDDs or SSDs to meet capacity and performance needs; the device ships without installed drives. Power on the NAS and access the QNAP setup utility via Ethernet from a management workstation. Use the QuTS hero initialization wizard to configure system volumes, create RAID groups, and enable data protection features such as checksums and snapshots. Configure network settings, user accounts, and shared folders for file services (SMB, NFS, AFP) and integrate backup or virtualization targets as required.

Recommendations

For balanced performance and redundancy, choose enterprise-class NAS HDDs for bulk capacity and NVMe/SATA SSDs for cache or high-performance pools. Configure RAID levels that match your tolerance for redundancy and capacity (for example RAID 6 or RAID 10 where applicable). Keep QuTS hero firmware and apps updated, monitor system health via the QTS/QuTS management interface, and schedule regular backups or remote replication to a secondary location to ensure long-term data protection.