Overview
The Ubiquiti UNAS Pro 4 is a 1U rack-mount network attached storage system designed for large-scale file storage and sharing. It provides four 2.5/3.5-inch drive bays, two M.2 NVMe SSD slots for caching, dual 10G SFP+ networking, and a 1GbE RJ45 management interface.
Storage Architecture
The UNAS Pro 4 supports four 2.5/3.5-inch HDD or SSD drives and two M.2 NVMe SSDs for cache. Supported storage configurations include RAID 5, RAID 6, and RAID 10, while SSD cache can be used to improve access performance for supported workloads.
Network Connectivity
Two 10G SFP+ interfaces provide high-speed network connectivity, while a separate GbE RJ45 port supports 1G, 100M, and 10M Ethernet connections. The system is designed for high-bandwidth storage access and file-sharing environments.
Power and Rack Design
The 1U chassis includes an internal 150W AC/DC power supply and supports both universal 100–240V AC input and a USP-RPS DC input for power redundancy. The chassis uses SGCC steel for the enclosure and mounting hardware.
Key Features
- Four 2.5/3.5-inch HDD or SSD drive bays
- Two M.2 NVMe SSD cache slots supporting up to 4 TiB NVMe capacity
- Dual 10G SFP+ network interfaces
- RAID 5, RAID 6, and RAID 10 support
- USP-RPS support for redundant power connectivity
Applications
The UNAS Pro 4 is suited to rack-mounted storage deployments requiring multi-drive capacity, high-speed 10G networking, centralized file sharing, backup, snapshots, and cache-assisted storage access.
DC Supplies Product Note
Because the UNAS Pro 4 provides two 10G SFP+ ports but no 10GbE RJ45 interface, copper-based 10G connections require an appropriate SFP+ transceiver or cable compatible with the connected network equipment.
Specifications
| Brand | Ubiquiti |
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| Part Number / MPN | UNAS-Pro-4 |
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| Product Type | 1U Rack-Mount Network Attached Storage |
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| Drive Bays | 4 × 2.5/3.5-inch HDD / SSD |
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| M.2 NVMe Bays | 2 |
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| Maximum NVMe SSD Capacity | 4 TiB |
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| Networking | 2 × 10G SFP+; 1 × GbE RJ45 |
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| GbE RJ45 Speeds | 1G / 100M / 10M |
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| Processor | Quad-Core ARM Cortex-A57, 2.0 GHz |
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| Memory | 8 GB |
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| RAID Types | RAID 5, RAID 6, RAID 10 |
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| Supported File Protocols | NFS, SMB |
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| SSD Cache | Supported |
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| File Encryption | Supported |
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| Snapshots | Supported |
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| Time Machine Backup | Supported |
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| Cloud Backup | Google Drive, OneDrive, Dropbox, Amazon S3, Backblaze B2, Wasabi |
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| Bluetooth | Bluetooth 4.1 |
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| Power Supply | Internal 150W AC/DC |
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| AC Input | 100–240V AC, 3A max., 50/60 Hz |
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| Redundant Power Input | USP-RPS, 11.5V DC, 13.91A |
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| Maximum Drive Power Budget | 125W |
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| Maximum Power Consumption | 150W |
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| Form Factor | 1U Rack Mount |
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| Dimensions | 442.4 × 400 × 43.7 mm |
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| Weight | 6.7 kg |
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| Enclosure Material | SGCC Steel |
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| Operating Temperature | -5 to 40°C |
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| Operating Humidity | 5–95% noncondensing |
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| NDAA Compliant | Yes |
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| Certifications | FCC, CE, IC |
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FAQs
How many drives does the UNAS Pro 4 support?
It has four 2.5/3.5-inch drive bays for HDD or SSD storage, plus two M.2 NVMe slots for SSD caching.
Does the UNAS Pro 4 support 10G networking?
Yes. It has two 10G SFP+ interfaces. The separate RJ45 Ethernet interface supports 1G, 100M, and 10M speeds.
Which RAID levels are supported?
Ubiquiti specifies RAID 5, RAID 6, and RAID 10 support for the UNAS Pro 4.
Can the UNAS Pro 4 use redundant power?
Yes. In addition to its universal AC input and internal 150W power supply, it provides a USP-RPS DC input for power redundancy.
What operating system or storage platform does it use?
The UNAS Pro 4 is part of Ubiquiti's UniFi network storage platform and supports features including SMB, NFS, snapshots, file encryption, remote UNAS backup, and cloud backup.
