Ubiquiti · NAS buying guide
Ubiquiti UNAS 2 · Exact identity: UNAS-2
2 primary bays · Ubiquiti embedded processor · 4GB factory memory · 1 × 2.5GbE · Diskless: hard drives cost extra
Catalog amount: $219 · recent · Price record: 2026-10-09T03:47:48.120432+00:00. Tax and shipping excluded.
Price observed at the store on the shown date. Confirm the current price and availability at the store.
UNAS 2: specifications and dated store comparison →Compact RAID 1 file storage with included PoE++ power
UNAS-2 · official colors UNAS-2-B / UNAS-2-W · Quad-core ARM Cortex-A55 at 1.7 GHz · 4 GB factory memory · (2) 3.5-inch HDD bays · 1×2.5GbE PoE++ · UniFi Drive 3.1.7+
Based on the current US UniFi Store and tech-specs tables (opened 2026-09-11), the official installation guide stills, Ubiquiti’s limited-warranty policy, and three original UNAS 2 experiments (Dong Knows Tech, StorageReview, NAS Compares) plus a 2026 follow-up. ChooseCompute has not tested this NAS itself. See the review evidence ↓
One 2.5GbE PoE++ cable plus the included 60W injector, UniFi Drive snapshots/backups, and a compact 135×129×223.7 mm chassis.[1][2]
Follow any specification for its full conditions and sources.
Living with it
UNAS-2 is Ubiquiti’s diskless two-bay desktop NAS. The store product is UNAS 2; checkout SKUs are UNAS-2-B (black) and UNAS-2-W (white). Hardware is a quad-core ARM Cortex-A55 at 1.7 GHz with 4 GB memory, one 2.5GbE RJ45 that also takes PoE++, a 5 Gbps USB-C port, and a 1.47-inch status display. A 60W PoE++ adapter is included. US store list price on 2026-09-11 was $199, $214 with the memory/storage surcharge, both colors Available.[1][2]
Official tech specs list (2) 3.5-inch drive bays and (2) 3.5-inch HDD support — not 2.5-inch SSDs and not M.2. The installation guide shows the entire underside cage sliding out; Dong Knows and NAS Compares both describe a shared non-hot-swap tray. RAID on the official table is RAID 1 with a single RAID group. Dong Knows found a second disk is absorbed as RAID 1 rather than a second volume or RAID 0.[2][4][5][7]
UniFi Drive handles SMB/NFS, snapshots, encryption, Time Machine and backups to remote UNAS, SMB and supported clouds. Minimum supported Drive 3.1.7 is not the current installed version. Original reviewers found no general container, VM or media-server application stack. Later software observations and third-party issue reports are kept separate below.[2][8][5]
NAS Compares’ August 2026 follow-up describes approximately 11 months with its UNAS 2, and Drive 4.3.10 / NAS OS 5.1.30 by August. This continues the original test, rather than adding an independent sample. USB-network stalls and iPhone photo-backup problems cited from other owners are reports, not measured defect rates or this reviewer’s controlled test.[8]
Our buying advice combines official specifications with the original reviews below. We have not tested this product ourselves. Expand a review for its setup, measurements and limitations.
Dong NgoSep 26, 2025
Real-world RAID 1 copies averaged about 200 MB/s with both the 5400 RPM and 7200 RPM pairs. Internal drives were RAID 1 only; no RAID 0 or second volume. Underside dual tray is not hot-swap and did not accept 2.5-inch disks.
Read the original reviewDong Knows Tech UNAS 2 original test
Tested: UNAS-2-W; UniFi Drive 3.2.10; one week; first two 4 TB WD Red Plus 5400 RPM HDDs, then two 8 TB IronWolf 7200 RPM HDDs, both RAID 1. Ubiquiti Pro XG 8 PoE switch, native 2.5GbE NAS link; exact drive MPNs/client/file profile not stated.
Applies to: Direct UNAS 2 hardware. Numbers are that week-long sample, those disks, RAID 1 and 2.5GbE — not SSD, RAID 0 or later Drive 4.x.
| Measurement | Result | Conditions & source location |
|---|---|---|
| Charted file read/write | 188.68 MB/s read; 211.40 MB/s write | Original UNAS 2 chart rows; no separate result per tested drive pair.Original Read and Write Performance figures |
Limits to keep in mind
Dylan DoughertyDec 8, 2025
1M sequential reads mostly 258–266 MB/s, peak 270.5 MB/s (numjobs=1, iodepth=2, threads=1). Sequential-write chart spans approximately 190–258 MB/s; peak 257.9 MB/s. Later chart points fall below the prose’s 240–255 MB/s summary.
Read the original reviewStorageReview UniFi UNAS 2 FIO review
Tested: UNAS 2; UniFi OS 4.4.4 and Drive 3.2.14 visible in original dashboards. Two 22 TB WD Red Pro 7200 RPM HDDs in RAID 1; NFS FIO generator on 10GbE via switch, NAS native 2.5GbE. Exact drive MPN/client details not fully stated.
Applies to: Direct UNAS 2 sequential/random NFS figures at 2.5GbE. Not SMB copy rates and not an SSD array.
| Measurement | Result | Conditions & source location |
|---|---|---|
| FIO 1M sequential read | 258–266 MB/s typical; 270.5 MB/s peak | NFS, 2-drive RAID 1, NAS on 2.5GbEFIO sequential read |
| FIO sequential write peak | 257.9 MB/s | numjobs=64, iodepth=1, threads=1FIO sequential write |
| FIO 4K random read peak | 627 IOPS | numjobs=64, iodepth=4, threads=1FIO random read |
| FIO 4K random write | Mainly 2.1–2.2K IOPS; plotted peak about 2.34K IOPS | RAID 1 NFS; approximate chart peak, numjobs=4, iodepth=1.Random-write IOPS figure |
| Minimum read latency | 7.571 ms sequential 1M; 6.129 ms random 4K | numjobs=1, iodepth=1, threads=1; minima, not saturated latencies.Read-latency prose and figures |
| Minimum write latency | 9.067 ms sequential; 0.982 ms random 4K | numjobs=1, iodepth=1, threads=1; different block sizes, not directly comparable.Write-latency prose and figures |
Limits to keep in mind
Rob AndrewsSep 18, 2025
Reads up to 260 MB/s and writes in the 160–180 MB/s range on their test; CPU toward 79–80°C under load. Power about 16–17 W idle, 18–20 W light, 23–24 W heavier, ~25 W peak during RAID sync — under the 60 W official ceiling.
Read the original reviewNAS Compares UniFi UNAS 2 review
Updated Sep 29, 2025
Tested: UNAS 2; two 8 TB HDDs in RAID 1 over native 2.5GbE; AJA and CrystalDiskMark described. Exact HDD MPN, firmware, client and acoustic instrument/distance/background not specified.
Applies to: Direct UNAS 2. Power and dBA are that sample and those drives.
| Measurement | Result | Conditions & source location |
|---|---|---|
| Read/write (reviewer test) | Up to 260 MB/s read; 160–180 MB/s write | UNAS 2, 2.5GbE, reviewer workloadQuick conclusion |
| Power | 16–17 W idle; 23–24 W heavier; ~25 W peak | Reviewer sample with HDDsPower paragraph |
| Noise | 31–32 dBA idle; 35–38 dBA load | Reviewer room/meter; drive-dominatedNoise paragraph |
| Temperature | CPU 75–80°C load; 50–60°C light/idle; exterior about 39–50°C | Reviewer readings, no controlled failure or throttling test.Temperature paragraph |
Limits to keep in mind
Examples ordered by recorded drive unit price, which may be historical or an editorial reference. Check capacity, vendor compatibility, included storage and price evidence before choosing. These are component checks, not compatibility certifications.
Component total: $528.98 · historical · Oldest price record: 2026-10-09T01:23:41.974420+00:00 · 4TB raw, before redundancy.
Historical price estimate. Calculated from separately purchased components, not a complete-system offer. NAS price record: 2026-10-09T03:47:48.120432+00:00; drive price record: 2026-10-09T01:23:41.974420+00:00. Price observed at the store on the shown date. Confirm the current price and availability at the store. Historical price observation. Recheck the price and availability before buying; this is not a current offer. Recheck component prices, stock, shipping and tax at the stores before purchase; even recent checks do not guarantee live prices.
Component total: $598.98 · recent · Oldest price record: 2026-10-09T03:47:48.120432+00:00 · 8TB raw, before redundancy.
Dated price estimate. Calculated from separately purchased components, not a complete-system offer. NAS price record: 2026-10-09T03:47:48.120432+00:00; drive price record: 2026-10-09T03:58:24.994342+00:00. Price observed at the store on the shown date. Confirm the current price and availability at the store. Price observed at the store on the shown date. Confirm the current price and availability at the store. Recheck component prices, stock, shipping and tax at the stores before purchase; even recent checks do not guarantee live prices.
Component total: $608.98 · historical · Oldest price record: 2026-09-27T13:58:17.239646+00:00 · 8TB raw, before redundancy.
Historical price estimate. Calculated from separately purchased components, not a complete-system offer. NAS price record: 2026-10-09T03:47:48.120432+00:00; drive price record: 2026-09-27T13:58:17.239646+00:00. Price observed at the store on the shown date. Confirm the current price and availability at the store. Historical price observation. Recheck the price and availability before buying; this is not a current offer. Recheck component prices, stock, shipping and tax at the stores before purchase; even recent checks do not guarantee live prices.
Before you buy
Budget two 3.5-inch HDDs (not included), a PoE++ switch port or the included 60W injector, and backup storage. On 2026-09-11 the US UniFi Store showed $199 list and $214 with surcharge for UNAS-2-B and UNAS-2-W. UI Care was a separate $49 add-on, not the hardware warranty.[1][3]
The only Ethernet port is 2.5GbE. Tests sit at or below that link. There is no second NIC and no official USB-NIC upgrade.[2][6]
Official webstore coverage is two years from delivery. Authorized-channel coverage runs one year from shipment to that distributor/reseller. A reseller’s own purchase date is not automatically the warranty start date. UI Care is optional.[3]
UNAS-2 · official colors UNAS-2-B / UNAS-2-W · Quad-core ARM Cortex-A55 at 1.7 GHz · 4 GB factory memory · (2) 3.5-inch HDD bays · 1×2.5GbE PoE++ · UniFi Drive 3.1.7+ Check the total delivered price at the store.
Lowest observed price
$219
In stock at observation
Currency not confirmed
4 stores · 1 recent price observation
Seller not recorded
$219
Observed price
Currency not confirmed
In stock at observation · Condition not recorded
Observed Oct 9, 2026, 3:47:48 AM UTC[11]
View exact product at UbiquitiSold by Microcom
$199
Historical price
Stock not confirmed · New
UNAS-2-B black diskless enclosure; HDD not included
Not stated beyond 6–8 week ship estimate. 6–8 week ship estimate; confirm availability, any surcharge and authorized-channel eligibility. Ubiquiti coverage through authorized resellers runs from shipment to the reseller, not from the end buyer’s purchase.
Observed Sep 11, 2026, 9:55:00 AM UTC[10]
View exact product at MicrocomSold by SIMPLIZED
$336.99
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 27, 2026, 3:10:46 PM UTC[12]
View exact product at NeweggSeller not recorded
Check price
Stock not confirmed · Condition not recorded
Observed Date not confirmed
View exact product at AmazonPrices are dated observations. Confirm the model, seller, condition, stock and delivered total at the store. Older prices remain visible as history. Links may earn a commission.
UNAS-2, sold as UNAS-2-B or UNAS-2-W. Quad-core ARM Cortex-A55 1.7 GHz, 4 GB, two 3.5-inch HDD bays, one 2.5GbE PoE++ port, UniFi Drive.[1][2]
No. It is a diskless enclosure. Official QIG mounts 3.5-inch HDDs in the underside tray.[1][4]
No. StorageReview NFS sequential reads sat around 258–266 MB/s on RAID 1 HDDs. Dong Knows copies averaged ~200 MB/s. Client NICs, files and RAID rebuilds still matter.[6][5]
Not as a UniFi Drive appliance. Official software flags are file protocols, snapshots, backups and Time Machine. Reviewers found no media/VM/download app stack.[2][5]
No. Official store variants of product UNAS-2 are color SKUs UNAS-2-B and UNAS-2-W. Hardware rows are shared.[1]
Research updated Sep 11, 2026. Individual source check dates are listed below. Measurements belong to the named reviewers; tested configurations and software versions may differ from the product you buy.
Checked Sep 11, 2026 · NEXT_DATA collection.products[0]: displaySku UNAS-2; variants UNAS-2-B/W Available; $199 / $214 with surcharges
Checked Sep 11, 2026 · technicalSpecification sections Overview/Hardware/Software; product.name UNAS-2
Checked Sep 11, 2026 · Full policy read: two years from direct delivery; one year from shipment to authorized distributor/reseller; replacement does not extend term.
Checked Sep 11, 2026 · Rendered QIG pages 3 and 5: underside cage removal; 3.5-inch HDD + 6#-32 screw
Checked Sep 11, 2026 · Wayback 20260513193946 plus search extract; RAID 1 ~200 MB/s; UNAS-2-W
Checked Sep 11, 2026 · Dylan Dougherty 2025-12-08; FIO NFS section
Checked Sep 11, 2026 · Parent read full available original written article via web; figure access limits recorded in audit.
Checked Sep 11, 2026 · Parent read full available original written article via web; figure access limits recorded in audit. Follow-up continues the same original test family.
Checked Sep 11, 2026 · Same NEXT_DATA as official-product; $214 with surcharges, Available
Checked Sep 11, 2026 · Item# UNAS-2-B $199.00; Usually ships in 6-8 weeks; HDD not included
Checked Oct 9, 2026 · Captured observation; sha256:46cb50ff1b3bbc7205cdfb12c350e2b07bf218b73aea6235bee2a78a013269ef
Checked Sep 27, 2026 · Captured observation; sha256:8dcbfda9fedd44798bf333fc54a94e1e4488419fc91a164d06160a628376a08f
Independent review completed for the scope recorded in the audit.
Source evidence and review history (JSON)