English
The Ubiquiti Enterprise NAS (ENAS) marks the brand’s official entry into lightweight enterprise business storage, packing robust enterprise hardware into a cost-effective 3U rackmount unit with a $3,999 MSRP (temporary memory surcharges raise out-of-box pricing). It features a 2.4GHz eight-core Arm Neoverse N2 processor, 64GB ECC memory, 16 hot-swap drive bays, dual native 25GbE SFP28 ports, and redundant 550W hot-swap power supplies. Running open ZFS firmware with full out-of-box software features, it requires no paid licenses, feature unlocks, or mandatory support contracts— a key differentiator in the mid-tier NAS market.
Its biggest hardware advantage over competitors like Synology’s RS4021xs+ is standard dual 25GbE networking; rival 16-bay rackmount NAS units limit 25GbE connectivity to aftermarket PCIe add-in cards, shipping only with 10GbE ports. Paired with ECC memory and redundant power, ENAS bridges the gap between consumer SMB NAS and entry-level enterprise storage arrays. This flagship also caps Ubiquiti’s rapid portfolio expansion, building on its networking heritage (WiFi 7 E7 APs, 10G fiber gateways) and evolving consumer UNAS storage lineup. Unlike prior UNAS devices, ENAS supports ZFS, native iSCSI, and SAS expansion, though UNAS data cannot be directly migrated—only user settings and configurations transfer over.
While Synology and QNAP dominate the two-decade-old SMB NAS market with mature app ecosystems, containers, and full backup suites, they faced criticism in 2025 for restrictive validated drive policies (later relaxed via DSM 7.3). ENAS capitalizes on this gap with an open drive compatibility policy and license-free enterprise features. Targeted at small-to-midsize businesses and MSPs with existing UniFi infrastructure, it integrates seamlessly with UniFi’s unified management console, supporting multi-site monitoring, centralized identity management, and remote file access via UniFi Endpoint, eliminating siloed storage management.
Core Specifications
Form Factor: 3U rackmount, 481.4 × 480 × 132mm, 16.1kg
Storage: 16×2.5/3.5” hot-swap HDD/SSD bays, 2×M.2 NVMe cache slots, 2×SFF-8644 24G SAS expansion ports
Networking: 2×25G SFP28 (25G/10G/1G), 1×10GbE RJ45 multi-speed port
Compute & Memory: 8-core Arm N2 2.4GHz CPU, 64GB ECC RAM
Power: Dual hot-swap 550W CRPS redundant power supplies
Software Features: ZFS RAID-Z1/Z2/Z3/mirror, NFS/SMB/iSCSI support, snapshots, replication, cloud backup
(major cloud platforms), drive encryption, Time Machine backup
Environment: -5°C to 40°C operating temperature, NDAA compliant
Build & Design
ENAS adopts enterprise-grade rack server design, with upgraded hot-swap drive caddies featuring central release buttons and status LEDs for easier dark-rack drive replacement. It uses tool-less King Slide 4-post rack rails compatible with 600–1066mm rack depths, while aluminum rack handles double as latch releases and bezel anchors. Cost tradeoffs include plastic caddy release levers (downgraded from UNAS Pro aluminum) and screw-mounted 2.5-inch drives, increasing deployment effort for full SSD setups.
The dense rear I/O panel houses console, dual 25GbE ports, and dual Mini-SAS HD expansion ports, supporting two 16-bay expansion chassis to scale total capacity to 48 bays (over 1PB raw storage). Internal M.2 slots require optional Ubiquiti SSD trays and operate as read-only cache (no write cache support for ZFS volumes), optimizing random-access workloads while bypassing large sequential files to preserve SSD endurance.
Optional 3U bezels include a 4.7-inch touchscreen RGB model and blank lite version, connecting via front magnetic USB-C. A notable design flaw is the absence of a physical power button; remote power-on relies solely on Wake-on-LAN, and local reboot requires reseating power cords, creating operational hurdles for unattended rack deployments.
Management & Software
ENAS is managed via UniFi Drive on UniFi OS, integrating with existing UniFi network, security, and compute infrastructure for unified fleet monitoring via Site Manager. Administrators configure ZFS storage pools, SMB/NFS file shares, iSCSI block LUNs, and automated data protection workflows including snapshots, cross-device replication, and multi-cloud backups. It supports AD/LDAP integration, inline ZFS compression, and deduplication (recommended only for SSD pools due to high resource usage).
The software stack prioritizes core storage functionality over extensibility, lacking the app ecosystems, containerization, and dedicated backup suites of Synology/QNAP platforms. However, UniFi Drive receives frequent updates (latest v4.3.10), with confirmed upcoming features including immutable snapshots and advanced multi-site backup orchestration. The read-only M.2 cache accelerates concurrent office file sharing and database workloads but provides minimal benefit for large media streaming tasks.
Performance Testing
Testing was conducted on an 8-drive RAID-Z2 Seagate IronWolf Pro CMR HDD pool, benchmarking NFS async/sync and iSCSI performance with/without M.2 cache across random 4K and sequential 1M workloads:
4K Random Reads: All NFS configurations peaked at 89.5K–90.9K IOPS with low latency, leveraging ZFS ARC caching for consistent performance. iSCSI maxed out at 40.4K IOPS, nearly half NFS throughput.
4K Random Writes: Async NFS hit 9.6K–10.1K IOPS (cache-aided), while synchronous NFS collapsed to hundreds of IOPS due to no dedicated ZFS write log (SLOG). Cached iSCSI writes reached 15.2K IOPS, a substantial improvement over bare-metal 4.5K IOPS.
1M Sequential Reads: NFS delivered industry-leading 4.1GB/s+ sustained throughput, fully utilizing dual 25GbE links. iSCSI reads underperformed at 227–257MB/s, a firmware-limited oversaturation issue.
1M Sequential Writes: Async NFS peaked at 2.5–2.6GB/s, matching RAID-Z2 hardware limits. Sync NFS capped at 137–142MB/s, while iSCSI writes achieved a stable 1.4GB/s, confirming read-path anomalies are software-bound.
Conclusion
The Ubiquiti ENAS delivers exceptional enterprise hardware value at its $3,999 price point, bundling native dual 25GbE, ZFS, ECC memory, redundant power, and 48-bay scalability—features that require costly upgrades from competing vendors. Benchmarks validate strong real-world performance: 4.1GB/s+ sequential reads, 2.6GB/s writes, and 90K 4K random read IOPS, exceeding typical SMB storage requirements.
Its primary limitation is a streamlined software ecosystem lacking advanced virtualization, container, and backup tools. Synchronous write latency and iSCSI sequential read bottlenecks also require workflow planning. Even so, ENAS is the most competitive storage product in Ubiquiti’s lineup, ideal for UniFi-native SMB/MSP environments seeking license-free, low-management enterprise storage. With ongoing software updates closing feature gaps, it poses a legitimate challenge to established NAS market incumbents.
Beijing Qianxing Jietong Technology Co., Ltd.
Sandy Yang/Global Strategy Director
WhatsApp / WeChat: +86 13426366826
Email: yangyd@qianxingdata.com
Website: www.qianxingdata.com/www.storagesserver.com
Business Focus:
ICT Product Distribution/System Integration & Services/Infrastructure Solutions
With 20+ years of IT distribution experience, we partner with leading global brands to deliver reliable products and professional services.
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Sandy Yang/Global Strategy Director
WhatsApp / WeChat: +86 13426366826
Email: yangyd@qianxingdata.com
Website: www.qianxingdata.com/www.storagesserver.com
Business Focus:
ICT Product Distribution/System Integration & Services/Infrastructure Solutions
With 20+ years of IT distribution experience, we partner with leading global brands to deliver reliable products and professional services.
“Using Technology to Build an Intelligent World”Your Trusted ICT Product Service Provider!