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Network Storage

UniFi UNAS Pro 4

$499 MSRP
UniFi UNAS Pro 4, a 1U rack-mount NAS with four drive trays in a single row

UniFi UNAS Pro 4: what it is & who it's for

Shares the UNAS Pro 8's 2.0 GHz processor, two NVMe cache slots and pair of 10G SFP+ ports, in 1U with four bays instead of eight. Memory, the RJ45 port and the power design are where it steps down. A shallow or crowded rack that wants NVMe-cached 10-gigabit storage in 1U, where four bays is enough.

Specifications

UniFi UNAS Pro 4 specifications
ProcessorQuad-core ARM Cortex-A57 at 2.0 GHz
System Memory8 GB
Drive Capacity(4) 2.5/3.5" HDD / SSD + (2) M.2 NVMe SSD
SSD CacheYes
Max NVMe SSD Capacity4 TiB
Max Power Budget for Drives125 W
Networking Interface(2) 10G SFP+ (10G only) + (1) GbE RJ45 (1G/100M/10M)
RAID TypesRAID 5, RAID 6, RAID 10
RAID GroupsSingle
File ProtocolsSMB, NFS
SnapshotsYes
File EncryptionYes
Time Machine BackupYes
Backup DestinationsRemote UNAS, CIFS/SMB server, cloud (Google Drive, OneDrive, Dropbox, Amazon S3, Backblaze B2, Wasabi)
Power RedundancyYes (USP-RPS)
Power SupplyAC/DC, internal, 150 W
Form FactorRackmount (1U)
Dimensions442.4 × 400 × 43.7 mm
Weight6.7 kg
Max Power Draw150 W

Verdict

Shares the UNAS Pro 8's 2.0 GHz processor, two NVMe cache slots and pair of 10G SFP+ ports, in 1U with four bays instead of eight. Memory, the RJ45 port and the power design are where it steps down.

Pros
  • 1U and 6.7 kg — the UNAS Pro is 9.2 kg and the UNAS Pro 8 is 11.5 kg, both in 2U
  • Two M.2 NVMe slots for SSD cache — the same-priced UNAS Pro lists none
  • Two 10G SFP+ ports against the single one on the UNAS Pro
  • USP-RPS DC input for power redundancy
Cons
  • Four bays, and Ubiquiti lists a single RAID group
  • The spec sheet carries no hot-spare row, which the UNAS Pro and UNAS Pro 8 sheets both do
  • The RJ45 is 1 GbE, so 10-gigabit means SFP+
  • Redundant power means buying a USP-RPS
Best forA shallow or crowded rack that wants NVMe-cached 10-gigabit storage in 1U, where four bays is enough.
A UniFi rack: gateway, PoE panel, switch and patch panel above a network video recorder and NAS.
Our rack — not this model.

Alternatives

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