Technical reference
Seagate IronWolf Pro ST28000NT000 28TB specifications
One 28 TB ST28000NT000 drive · 3.5-inch SATA · CMR · 7200 RPM
Complete specifications with requirements, upgrade limits and sources. For our buying judgment, reviews and prices, return to the buying guide.
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Search all 43 specifications, including conditions and limits.
Identity and capacity
Match the exact model and available storage.
| Exact model | ST28000NT000[1] |
|---|---|
| Marketed capacity | 28 TB[1] Decimal capacity; formatting and RAID reduce available storage. |
| Form factor | 3.5-inch[1] |
| Interface | SATA 6 Gb/s[1] SATA, not SAS; 6 Gb/s is the interface ceiling. |
| Sector format | 512e; 512-byte logical / 4096-byte physical[1][2] |
| Recording technology | CMR[1][10] Seagate’s CMR/SMR list places IronWolf Pro 28TB in Mozaic HAMR CMR with 30/32TB. DS2129.7 still prints CMR on the recording-technology row. HAMR writing and CMR tracks coexist; this is not SMR. |
| Drive design | Helium[1] |
Performance
Drive ratings are separate from whole-NAS throughput.
| Spindle speed | 7200 RPM[1] |
|---|---|
| Cache | 512 MB[1] |
| Maximum sustained transfer rate | 270 MB/s at outer diameter[1] Manufacturer rating, not an independent test or whole-disk guarantee. |
| Average rotational latency | 4.16 ms[2] |
| Power-on / standby to ready | 30 s typical / 60 s maximum[2] Specified clean shutdown and normal startup conditions; recovery may take longer after unexpected power loss. |
NAS operation
Workload and RAID support for shared storage.
| Drive bays supported | Unlimited[1] Manufacturer bay-count rating does not establish compatibility with every NAS. |
|---|---|
| Annual workload limit | 550 TB/year[1][2] Includes reads and writes; annualized by power-on hours. This is not a lifetime TBW allowance. |
| Power-on hours | 8760 hours/year[1] |
| Rotational vibration sensors | Yes[1] |
| RAID features | AgileArray; dual-plane balancing; time-limited error recovery[1] |
| IronWolf Health Management | Supported on compatible NAS platforms[1] Availability depends on the NAS vendor and software. |
| Hot-plug interface support | SATA Revision 3.3[2] Host/controller and enclosure must also support safe hot swap. |
Reliability and support
Understand what ratings and coverage do—and do not—promise.
| MTBF rating | 2.5 million hours[1][2] Population engineering rating under specified conditions; not expected service life of one drive. Manual section2.9 assumes8760 power-on hours/year,10–30°C drive-reported temperature, wet-bulb ambient≤26°C and specified workload/contamination limits; maximum operating temperature is not the MTBF rating condition. |
|---|---|
| Nonrecoverable read errors | 1 sector per 10^15 bits read[2] Manual specification; not a measured failure rate. |
| Load/unload cycles | 600, 000[2] |
| Limited warranty | 5 years[1][2] Check serial number, seller and purchase country for the supplied drive. |
| Rescue Data Recovery Services | 3 years[1] Not available in every country; recovery is not guaranteed and does not replace a backup. |
Power and acoustics
Plan cooling, startup power and placement.
| Average operating power | 8.3 W[1] Datasheet nominal average. Manual workload-specific power tests differ; do not treat this as maximum PSU demand. |
|---|---|
| Average idle power | 6.8 W[1] Datasheet idle value; firmware background activity can raise power. |
| Typical standby / sleep power | 1.2 W / 1.2 W[1] |
| Typical startup current | 2.0 A at 12 V[1] Allow for simultaneous spin-up across all installed drives. |
| Power rails and tolerance | 5 V ±5%; 12 V ±10%[2] |
| Idle / seek acoustics, datasheet | 28 / 32 dBA typical[1] Datasheet idle is measured in Idle 1. Not a promise of noise at your listening position. The manual reports sound power separately. |
| Sound power, manual | Idle 2.8 / 3.0 bels; performance seek 3.2 / 3.4 bels (typical / maximum)[2] ISO 7779 A-weighted sound-power conditions, cover upwards. Do not equate bel sound power with room sound-pressure readings. |
Environment and physical
Check the enclosure and the applicable operating limits.
| Operating temperatures | 10 °C minimum ambient; 60 °C maximum drive-reported[1] Different temperature reference points; cooling is still required. |
|---|---|
| Non-operating temperature | −40 °C to 70 °C ambient[1] |
| Relative humidity | 5–95%, non-condensing[2] Operating and non-operating; maximum gradient 20% per hour. |
| Operating altitude | −304.8 m to 3048 m[2] |
| Non-operating altitude | −304.8 m to 12, 192 m[2] |
| Operating shock, read/write | 30 / 30 g, 2 ms[1] |
| Non-operating shock | 200 g, 1 and 2 ms[1] |
| Operating linear vibration | 0.70 Grms, 5–500 Hz[2] |
| Operating rotary vibration | 12.5 rad/s², 20–1500 Hz[2] Manual test spectrum; greater than 90% sequential/random-write throughput criterion. |
| Non-operating linear vibration | 2.27 Grms[1][2] Datasheet 10–500 Hz; manual test spectrum 2–500 Hz. These are reported with their source conditions. |
| Dimensions, H × W × D | 26.11 × 101.85 × 146.99 mm[1] |
| Typical weight | 695 g[1] |
Exact product identity & open questions
- Exact-model independent tests: No professional laboratory of ST28000NT000 was found. Owner reports (USB-dock copy; Best Buy shipping/RAID anecdotes) are not lab measurements. 32TB ComputerBase/StorageReview numbers remain related only.
- System-specific compatibility and lifetime: No exact enclosure/firmware qualification or long-term fleet failure study was established by this page. Manufacturer ratings do not establish either.
- Current US offer coverage: On 2026-09-11 Newegg’s visible primary price for ST28000NT000 was $1,019.99 in stock (Newegg-sold). Older B&H and Adorama rows keep their 2026-09-08 times. Confirm seller, new condition and shipping at purchase.
Sources
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.
- [1] Seagate IronWolf Pro model specification table ↗
Checked Sep 11, 2026 · DS2129.7-2510US p.2 ST28000NT000 column: 512 MB, 270 MB/s OD, 550 TB/year, 6.8 W idle, 8.3 W operating, 28/32 dBA, 10 °C min ambient, 60 °C drive-reported max.
- [2] Seagate IronWolf Pro SATA product manual ↗
Checked Sep 11, 2026 · 207967700B covers ST32000NT000 / ST30000NT011 / ST28000NT000 / ST24000NT031 — not ST24000NT002. Shared tables; 30/60 s ready; cache 512 MB row.
- [3] B&H ST28000NT000 product offer ↗
Checked Sep 8, 2026 · Product heading / MFR, selected capacity and quantity; primary purchase area and seller disclosure. Exact MFR; single drive; primary new listing says Temporarily Out of Stock. Price is an unavailable listing, not a buy-now quote.
- [4] Newegg ST28000NT000 product offer ↗
Checked Sep 8, 2026 · Product heading / MFR, selected capacity and quantity; primary purchase area and seller disclosure. Exact model and capacity; primary Add to cart offer. Limit 1 per customer.
- [5] Adorama ST28000NT000 product offer ↗
Checked Sep 8, 2026 · Product heading / MFR, selected capacity and quantity; primary purchase area and seller disclosure. Exact MFR and single-drive selector verified; active primary stock not visible, so selector price is not quoted.
- [6] Newegg: ST28000NT000 current US new listing ↗
Checked Sep 10, 2026 · Exact MPN in H1; selected main offer shows Add to cart, seller Newegg, and a visible price of $1019.99.
- [9] Newegg ST28000NT000 product page ↗
Checked Sep 11, 2026 · Newegg item 22-185-113 FinalPrice 1019.99 Instock true
- [10] Seagate CMR and SMR Hard Drives — IronWolf Pro classification ↗
Checked Sep 11, 2026 · 3.5-inch IronWolf Pro table: CMR 2–24TB; Mozaic HAMR CMR 28/30/32TB; SMR N/A
- [11] Materiel.net StephaneL ST28000NT000 owner review ↗
Checked Sep 11, 2026 · StephaneL 2026-06-08; variant 28 To 512 Mo; W11 NTFS-GPT; copy 200–250 Mo/s USB dock
- [12] Best Buy ST28000NT000 owner reviews (8) ↗
Checked Sep 11, 2026 · 8 reviews on 28TB product page; Incentivized + Verified Purchaser badges
Research and review record
- Research: Grok 4.6 · Source research and data update
- Self-check: Grok 4.6 · Researcher self-check
- Independent review: GPT-6 (Codex) · Exact-model official table/manual discrepancies; original review or owner-source applicability; preserved material provenance and primary offers.
- Editorial integration: GPT-6 (Codex) · Editorial integration and validation
Independent review completed for the scope recorded in the audit.
Source evidence and review history (JSON)