1U rack-mount UniFi NAS
Ubiquiti UNAS-Pro-4 UniFi NAS 4-Bay Rack-Mount Storage
The Ubiquiti UNAS-Pro-4 UniFi NAS is a 1U rack-mount appliance with 4 2.5/3.5-inch drive bays, two M.2 NVMe SSD cache slots, a quad-core ARM Cortex-A57 processor, 8GB memory and high-availability 10Gbps networking.
- Processor
- Quad-core ARM Cortex-A57 at 2.0GHz
- Memory
- 8GB
- Storage
- 4 drive bays + 2 M.2 NVMe bays
- Networking
- 2 × 10G-only SFP+ and 1 × GbE RJ-45
Dense one-rack-unit storage with dual 10G links
The Ubiquiti UNAS-Pro-4 UniFi NAS is designed for larger file-storage and sharing environments managed through UniFi Drive. It supports SSD caching, NFS and SMB, file encryption, snapshots, share links, Time Machine backup and multiple local, remote and cloud backup targets.
Four rack-mount drive bays
Four qualified 2.5-inch or 3.5-inch HDDs or SSDs provide the primary storage tier.
Dual 10G SFP+ networking
Two 10G-only SFP+ ports support high-speed links, with a separate 1GbE RJ-45 port.
Dual NVMe cache bays
Two M.2 NVMe bays support SSD caching with a listed 4TiB maximum NVMe capacity.
Power-redundancy input
The internal AC supply is paired with a USP-RPS DC input for supported power redundancy.
Single RAID group
Current UniFi Drive specifications list RAID 5, RAID 6 and RAID 10 in one RAID group.
One-rack-unit footprint
The 1U chassis concentrates four drive bays and dual 10G connectivity into a compact rack space.
Who is the Ubiquiti UNAS-Pro-4 UniFi NAS best for?
A strong choice for
- UniFi rack environments
- Four-drive RAID 5, RAID 6 or RAID 10
- Dual 10G SFP+ links
- 1U storage deployments
- SSD-cached file sharing and backup
Consider another model if you need
- You need multiple RAID groups or hot-spare support
- You require a built-in 10GbE RJ-45 storage interface
- You need more than four primary bays
- Your rack does not meet the stated rail-depth requirements
Key specifications
- Model
- UNAS-Pro-4
- Form factor
- 1U rack mount
- Processor
- Quad-core ARM Cortex-A57 at 2.0GHz
- Memory
- 8GB
- Drive bays
- 4 × 2.5/3.5-inch HDD/SSD
- M.2 NVMe bays
- 2
- Networking
- 2 × 10G-only SFP+ and 1 × GbE RJ-45
- RAID
- RAID 5, RAID 6 and RAID 10
- Maximum power
- 150W
- Dimensions
- 442.4 × 400 × 43.7 mm
- Weight
- 6.7 kg
- Supported rack depth
- 600–1066 mm four-post racks with 9.5 × 9.5 mm square holes
Full technical specifications
Processor, storage and network
| Model | UNAS-Pro-4 |
|---|---|
| Processor | Quad-core ARM Cortex-A57 at 2.0GHz |
| Memory | 8GB |
| Drive bays | 4 × 2.5/3.5-inch HDD/SSD support |
| M.2 NVMe bays | 2 |
| SSD cache | Supported |
| Maximum NVMe SSD capacity | 4TiB |
| Networking | 2 × 10G-only SFP+ and 1 × GbE RJ-45 |
| Management | Ethernet |
| RF interface | Bluetooth 4.1 |
UniFi Drive features
| File protocols | NFS and SMB |
|---|---|
| RAID types | RAID 5, RAID 6 and RAID 10 |
| RAID groups | Single |
| Hot-spare support | Not specified |
| Personal and shared drives | Supported |
| File encryption | Supported |
| Snapshots | Supported |
| Share links | Supported |
| Time Machine backup | Supported |
| Backup targets | Remote UNAS, CIFS/SMB server, Google Drive, OneDrive, Dropbox, Amazon S3, Backblaze B2 and Wasabi |
Physical, power and environment
| Dimensions | 442.4 × 400 × 43.7 mm |
|---|---|
| Form factor | 1U rack mount |
| Weight | 6.7 kg |
| Enclosure | SGCC steel |
| Mount material | SGCC steel |
| Supported rack depth | 600–1066 mm four-post racks with 9.5 × 9.5 mm square holes |
| Maximum drive power budget | 125W |
| Maximum power consumption | 150W |
| Power method | Universal 100–240V AC input plus USP-RPS 11.5V DC input |
| Power supply | Internal 150W AC/DC |
| Operating temperature | -5°C to 40°C |
| Operating humidity | 5% to 95% non-condensing |
| Certifications | FCC, CE and IC |
| NDAA compliant | Yes |
Frequently asked questions about the Ubiquiti UNAS-Pro-4 UniFi NAS
What is the UNAS-Pro-4?
The UNAS-Pro-4 is a 1U rack-mount UniFi network storage appliance with 4 primary drive bays and two M.2 NVMe cache bays.
Which processor and memory are in the UNAS-Pro-4?
It uses a quad-core ARM Cortex-A57 processor at 2.0GHz with 8GB memory.
Which drives does the UNAS-Pro-4 support?
It provides 4 qualified 2.5-inch or 3.5-inch HDD/SSD bays plus two M.2 NVMe bays for caching.
What networking does the UNAS-Pro-4 provide?
It provides 2 × 10G-only SFP+ and 1 × GbE RJ-45.
Which RAID types does the UNAS-Pro-4 support?
Current UniFi specifications list RAID 5, RAID 6 and RAID 10.
Does the UNAS-Pro-4 support multiple RAID groups?
No. The UNAS Pro 4 is currently specified for a single RAID group.
Does the UNAS-Pro-4 support SSD caching?
Yes. It has two M.2 NVMe bays with a listed 4TiB maximum NVMe SSD capacity.
Can the UNAS-Pro-4 back up to cloud services?
Yes. UniFi lists Google Drive, OneDrive, Dropbox, Amazon S3, Backblaze B2 and Wasabi, as well as remote UNAS and CIFS/SMB targets.
How is the UNAS-Pro-4 powered?
It has an internal 150W AC/DC supply and a USP-RPS DC input for supported power redundancy.
What rack depth is supported for the UNAS-Pro-4?
The rails support 600–1066 mm four-post racks with 9.5 × 9.5 mm square holes.
- Confirm every HDD, SSD, transceiver and accessory against Ubiquiti's current qualified list.
- The M.2 NVMe bays are specified for SSD caching.
- The rack rails require the stated rack depth and square-hole dimensions.
- Actual capacity and performance depend on installed drives, RAID layout and network design.
