Ubiquiti UNAS-2-B UniFi Storage with (2) 3.5" HDD bays

Ubiquiti UNAS-2-B UniFi NAS Storage

Overview

The Ubiquiti UNAS-2-B (MPN: UNAS-2-B) is a compact network-attached storage device purpose-built for UniFi ecosystem deployments. This two-bay 3.5" HDD unit integrates directly with UniFi Network console management, enabling centralized monitoring and control alongside your security cameras, switches, and access points. The desktop/rack form factor makes it suitable for both small branch offices and distributed multi-site environments where local storage redundancy and failover capabilities are required.

Key Features

The UNAS-2-B operates over PoE++ (with included adapter), eliminating the need for separate power infrastructure in many deployment scenarios. Connectivity is handled via a single 2.5 GbE port, delivering sufficient throughput for continuous multi-camera recording and archival workloads without saturating network capacity. A USB-C port provides auxiliary connectivity for direct attachment or emergency backup scenarios. The unit's native integration with UniFi Network console allows administrators to configure storage policies, monitor disk health, and manage retention schedules from a unified dashboard—no separate NAS software or licensing required. At 2.850 lb, the device occupies minimal rack or desktop space.

Deployment Scenarios

This device is well-suited for small-to-medium UniFi camera installations (typically 4–8 camera sites) where on-premise recording and local archival are preferred over cloud-only solutions. Common use cases include retail locations, light industrial facilities, and branch office sites requiring 7–30 day rolling storage. The compact form factor also supports edge deployments in space-constrained environments such as server rooms, network closets, or wall-mounted cabinet installations. In multi-site organizations, UNAS-2-B units can be deployed at each location, each managed centrally through a single UniFi Network controller.

Network Integration

The 2.5 GbE interface is compatible with existing UniFi switch infrastructure and standard Ethernet networks. PoE++ power delivery via the included adapter simplifies cabling in environments where PoE-enabled upstream switches are not yet deployed. The device communicates with UniFi Network console over the same management network as cameras and controllers, requiring no separate VLAN or subnet configuration in most deployments. Storage can be provisioned as a single pool or configured with RAID mirroring for fault tolerance.

Installation Notes

The UNAS-2-B accepts standard 3.5" SATA HDDs; enterprise-grade disks (NAS-rated, 5400–7200 rpm) are recommended for 24/7 operation. Initial configuration occurs within UniFi Network console after device adoption. The unit should be positioned in a well-ventilated space and kept away from direct moisture or extreme temperature fluctuations. Typical deployment time from unboxing to operational recording is 15–20 minutes once disks are installed and the device is networked.

Jerry Tildsen, Senior Network Architect

"The UNAS-2-B fills a genuine gap for organizations already invested in UniFi. Rather than layering in a separate NAS vendor and managing multiple consoles, integrators can provision local storage that speaks the same language as the rest of the UniFi stack. PoE++ power is a practical touch that reduces installation complexity on-site. For a two-bay device at this price point, it's a straightforward recommendation for customer sites where cloud recording fees would exceed the cost of the unit within 12–18 months. The MPN UNAS-2-B is worth keeping in your standard bill of materials for any mid-sized UniFi camera project."