Ubiquiti UniFi UNAS Pro 8

The UNAS Pro 8 is Ubiquiti's second swing at rackmount storage, and it reads like a direct response to the feedback on the seven-bay original. The odd drive count is gone in favour of a conventional eight bays, there are now two M.2 NVMe slots for cache acceleration, and power redundancy arrives via a pair of hot-swappable 550W modules. At $799 for a 2U chassis with 16 GB of memory, dual 10G SFP+ and a multi-gig 10GbE RJ45 port, the hardware-per-dollar story is aggressive by NAS standards.

This is clearly aimed at the existing UniFi faithful: managed-service providers, small enterprises and prosumers who already live in unifi.ui.com and want storage that appears in the same console as their switches and cameras. NDAA compliance, steel construction, included four-post rails and a retailer-stated two-year warranty also make it an easy fit for public-sector and regulated deployments where a consumer-grade NAS would not pass procurement.

What it is not is a general-purpose application server. The quad-core ARM Cortex-A57 and fixed 16 GB of RAM signal a device designed to move files reliably rather than host virtual machines or transcode video, and the protocol list — NFS and SMB — reinforces that narrow focus.

Judged as a network file server for a UniFi site, this is a convincing package. RAID 5/6/10 with multiple RAID groups and hot-spare support, snapshots, file encryption, share links, user groups and Time Machine targets cover the essentials, and the backup options are unusually broad for a first-party appliance: remote UNAS, CIFS/SMB servers, and cloud destinations including Google Drive, OneDrive, Dropbox, Amazon S3, Backblaze B2 and Wasabi. Three 10G ports and a 225W drive power budget mean the chassis is not the bottleneck in a well-populated array.

The compromises are real and mostly architectural. ARM rather than x86 caps the ambitions here compared with Synology or QNAP equivalents — efficient, yes, but limited for heavy virtualisation or transcoding. Memory is reported as non-upgradeable, the NVMe slots top out at 4 TiB each, and the two SFP+ ports are fixed at 10G with no lower-speed fallback, so mixed-speed fibre environments need planning. The redundant power that headlines the spec sheet also appears to be aspirational out of the box: at least one retailer lists only one module included, with the second sold separately, which quietly raises the real cost of a fault-tolerant build. There is also a reporting discrepancy on CPU clock — 2.0 GHz per Ubiquiti and StorageReview, 1.7 GHz per NAS Compares — which we could not resolve from the available material, and we have no independent throughput figures to confirm how close it gets to saturating 10G.

Overall: a well-targeted, well-priced appliance that is genuinely better than its predecessor in the ways that mattered. Buy it to serve files inside a UniFi estate, not to replace a hypervisor. Four stars, with the missing point split between the ARM performance ceiling and the asterisk on that second power module.