General
Processor	4x Cortex-A55 1.70 GHz
Architecture	ARMv8.2-A
RAM	4 GB
Hard drive bays	2 3.5-inch
Interface	2.5-GbE RJ-45
Indication	LCD display
Bluetooth	4.1
PoE++

The Ubiquiti UNAS-2-B is a Network Attached Storage (NAS) server specifically developed for integration into UniFi networks. The device features two 3.5-inch HDD bays for storage expansion and is equipped with a 2.5-GbE network connection, enabling fast data transfer within the local network. The USB-C interface supports transfer rates up to 5 Gbit/s and allows connection of external storage devices or other USB-compatible devices. The compact design of the UNAS-2-B is suitable for use in offices, small businesses, or home applications where a central storage solution with network access is required.

Applications

The UNAS-2-B is primarily designed for use in networks with Ubiquiti products, especially in combination with UniFi network devices. It serves as a central storage solution for files, media content, backups, or as a basis for network services such as file sharing, backup systems, or media servers. Integration into existing UniFi infrastructures is achieved via the UniFi Network software, enabling management and monitoring of the NAS through the central network control. Due to its compact form factor, the device is also suitable for space-limited environments, such as server rooms, home offices, or small workstations.

Functions and Equipment in Detail

The device features two internal SATA bays for 3.5-inch hard drives, operating at SATA 6 Gb/s. The network interface supports 2.5-Gigabit Ethernet (2.5GBase-T), enabling significantly higher transfer rates compared to conventional 1-GbE connections. The USB-C interface offers a maximum transfer rate of 5 Gbit/s, allowing fast connection of external storage devices or other USB peripherals. An integrated LCD display enables the display of status information such as system status, network connection, or storage usage.

Technology Explained Simply

The UNAS-2-B is based on an ARMv8.2-A processor with four Cortex-A55 cores operating at a clock frequency of 1.70 GHz. This CPU architecture is designed for energy-efficient and high-performance network devices. The integrated RAM capacity is 4 GB, sufficient to support basic NAS functions such as file system management, network access, and services like SMB or NFS. The PoE++ function enables power supply over the network cable (Power over Ethernet), allowing the device to be operated from a PoE++-capable switch or via a PoE++ injector. This reduces the number of cables and simplifies installation, especially in environments where direct power supply is not available.

Compatibility and Accessories

The UNAS-2-B is specifically designed for use with Ubiquiti network products. It can be operated with a PoE++ injector (e.g. UACC-PoE++-10G), also available in the product range. This injector enables power supply over a 10-GbE network, making installation more flexible. Additionally, the device is compatible with the Ubiquiti UI Care service option, which provides additional support and maintenance services.

Mounting and Installation

The device is delivered in a compact, black-painted housing suitable for desktop or rack use. Installation is performed via the UniFi Network software, which enables network-based configuration of the NAS system. The PoE++ function allows cable-reduced installation, as the device is powered via the network cable. Network connection is established via the 2.5-GbE port, connecting to a PoE++-capable switch or a PoE++ injector. The USB-C interface can optionally be used for external devices.

Advantages in Operation

The UNAS-2-B offers an efficient and reliable storage solution for small to medium-sized networks. The combination of 2.5-GbE network and USB-C interface enables fast data transfers. PoE++ support reduces cable count and simplifies installation. Integration into the UniFi network environment enables central management and monitoring via the UniFi Network software. The LCD display provides a quick overview of system status. The use of 3.5-inch hard drives offers sufficient storage capacity for typical applications such as file storage, media libraries, or backups.