UniFi Enterprise NAS
UniFi Enterprise NAS, also referred to as ENAS in Ubiquiti's technical material, is the storage system for UniFi shops that have outgrown desktop appliances. It is a 3U rackmount NAS with sixteen SATA bays, NVMe support and fast network ports already on the chassis.
The box is only part of the purchase. Sixteen drives usually cost more than the NAS, so this page pairs the official chassis specification with current drive-fill estimates.
Available through Ubiquiti and selected sellers; third-party retail pricing may vary. Drive-fill estimates below use current HDD prices.
| Drive size | Drive pick | Drives | Raw storage | Estimated usable | Drive cost | $/usable TB | Offer |
|---|---|---|---|---|---|---|---|
| 12TB | WD Red Pro 12TB WD121KFBX $33.33/TB | 16 | 192TB | 168TB in RAID 6 | $6,399.84 | $38.09/TB | Buy on Amazon |
| 16TB | Seagate Exos X16 16TB $29.37/TB | 16 | 256TB | 224TB in RAID 6 | $7,519.84 | $33.57/TB | Buy on Amazon |
| 20TB | WD Ultrastar DC 20TB Renewed $28.50/TB | 16 | 320TB | 280TB in RAID 6 | $9,119.84 | $32.57/TB | Buy on Amazon |
| 22TB | WD Red Pro 22TB NAS WD221KFGX $35.23/TB | 16 | 352TB | 308TB in RAID 6 | $12,399.84 | $40.26/TB | Buy on Amazon |
| 24TB | Seagate Exos X24 24TB $33.29/TB | 16 | 384TB | 336TB in RAID 6 | $12,783.84 | $38.05/TB | Buy on Amazon |
| 32TB | Seagate SkyHawk AI 32TB ST32000VE000 $41.87/TB | 16 | 512TB | 448TB in RAID 6 | $21,439.84 | $47.86/TB | Buy on Amazon |
Drive costs use current DatacenterDisk prices and choose the lowest in-stock CMR/ePMR SATA drive at each capacity. Chassis price is excluded unless a current chassis price is available.
UniFi Enterprise NAS specifications
| Chassis | 3U rackmount |
|---|---|
| Drive bays | 16 x 2.5/3.5-inch SATA bays |
| NVMe bays | 2 x M.2 NVMe bays |
| Networking | 2 x 25GbE SFP28 plus 1 x 10GbE RJ45 |
| Expansion | 2 x SFF-8644 24G expansion ports |
| Processor | Eight-core ARM N2 at 2.4GHz |
| Memory | 64GB |
| Power | Redundant 550W AC/DC modules, 450W drive power budget |
Who should consider UniFi Enterprise NAS?
The strongest buyer is already operating a UniFi rack and wants storage managed alongside the network rather than a separate NAS ecosystem. Dual 25GbE gives the chassis enough network headroom for many-drive pools, backups, shared project storage and surveillance adjacent workloads that need fast centralized capacity.
It is less attractive if you want the broad application ecosystem of Synology DSM or QNAP QTS, or if a desktop four-bay NAS solves the problem. Sixteen bays only make sense when the drive budget, rack space, switch ports and backup plan are all part of the same purchase.
Drive compatibility and storage planning
Ubiquiti publishes storage requirements rather than a long model-by-model consumer NAS list. For hard drives, the fill estimate intentionally uses in-stock SATA CMR/ePMR drives and excludes unknown recording technology because a shingled drive is a poor fit for parity rebuilds in a large array.
For SSD cache, Ubiquiti's guidance favors M.2 NVMe SSDs. Cache is useful for hot random I/O, metadata and repeated access. Large sequential files may bypass cache in many storage systems, so fill the hard-drive pool correctly before spending heavily on cache.
Why the drives dominate the budget
A sixteen-bay NAS turns a small per-drive price difference into a large deployment delta. A $20 gap per drive is $320 before tax. A $5/TB gap at 24TB becomes $1,920 across sixteen drives. That is why the fill table uses live $/TB and usable-capacity math instead of a generic "from" price.
RAID 6 or RAID-Z2 is the sensible comparison point for sixteen large HDDs because the pool can survive two drive failures. It reduces usable capacity, but it also prevents a single failed rebuild from turning into a total restore event.
Frequently asked questions
What is the UniFi Enterprise NAS?
UniFi Enterprise NAS is Ubiquiti's 3U rackmount NAS with sixteen 2.5/3.5-inch SATA bays, two M.2 NVMe bays, dual 25GbE SFP28 and a 10GbE RJ45 port.
How many drives does UniFi Enterprise NAS hold?
The main chassis has sixteen SATA drive bays plus two M.2 NVMe bays. Ubiquiti also lists storage expansion hardware separately.
Does UniFi Enterprise NAS support 25GbE?
Yes. Ubiquiti's technical specifications list two 25GbE SFP28 ports and one 10GbE RJ45 port.
What drives should I use in UniFi Enterprise NAS?
For HDD pools, use CMR or ePMR SATA hard drives that meet Ubiquiti's storage requirements. For NVMe cache, use matched M.2 NVMe SSDs and check Ubiquiti's SSD cache guidance.
Does the drive-fill table include the chassis price?
No. The fill table shows current HDD pricing and excludes chassis cost unless a current chassis offer is available. It answers what the drives cost today.
Sources checked: Ubiquiti ENAS technical specifications, Ubiquiti ENAS store page, Ubiquiti storage compatibility guidance.