Seagate IronWolf Pro 3.5" 20TB, 7200 RPM, 256MB, SATA III Hard Drive for NAS
Key Specifications
Choose one or multiple features to search for items that have the same specifications.| Technical details | |
| Device type | HDD |
| Hard drive | |
| Drive device, buffer size | 256 MB |
| HDD interface | SATA |
| Device type | HDD |
| Weight & dimensions | |
| Weight | 670 g |
| Height | 26.1 mm |
| Width | 101.8 mm |
| Depth | 147 mm |
| Energy management | |
| Power consumption (typical) | 7.7 W |
| Power consumption (standby) | 1 W |
| Start-up current | 2 A |
| Power consumption (idle) | 5.5 W |
| Operating voltage | 5 / 12 V |
| Operational conditions | |
| Storage temperature (T-T) | -40 - 70 °C |
| Operating temperature (T-T) | 0 - 65 °C |
| Operating shock | 40 G |
| Non-operating shock | 200 G |
| Non-operating vibration | 2.27 G |
| Packaging data | |
| Quantity per pack | 1 pc(s) |
| Other features | |
| Product series | IronWolf Pro |
| Features | |
| Drive capacity | 20 TB |
| Interface | Serial ATA III |
| Type | HDD |
| HDD speed | 7200 RPM |
| Mean time between failures (MTBF) | 1200000 h |
| HDD size | 3.5" |
| Noise level (idle) | 28 dB |
| S.M.A.R.T. support | ![]() |
| Component for | NAS |
| Product type | HDD disk |
| HDD interface transfer rate | 6 Gbit/s |
| HDD average transfer rate | 285 MB/s |
| Workload rate limit | 300 TB/year |
| Storage drive buffer size | 256 MB |
| Rotational Vibration (RV) sensors | ![]() |
| 24/7 operation | ![]() |
| Logistics data | |
| Harmonized System (HS) code | 84717050 |
| EAN | 8719706427531 |
| Warranty | 1 year |
The Seagate IronWolf Pro ST20000NE000 is an internal hard drive with a 20 TB storage capacity, designed for use in NAS, PC, and server environments. It is built in a 3.5-inch form factor and connects via a SATA III interface that supports transfer rates up to 6 Gbit/s. The drive's performance is supported by a 7200 RPM spindle speed and a 256 MB cache, which facilitate efficient data processing and retrieval. These specifications make it suitable for multi-user applications and large-scale data management where both high capacity and consistent access speeds are required.
This hard drive is constructed for continuous operation, with a 24/7 availability rating and a workload limit of 300 TB per year. To maintain stable performance in multi-bay systems, it incorporates rotational vibration (RV) sensors that mitigate the effects of drive-to-drive vibration. Its reliability is rated with a Mean Time Between Failures (MTBF) of 1,200,000 hours. The unit also includes support for S.M.A.R.T. technology, which allows for monitoring the drive’s operational health and status.
Key Features:- 20 TB storage capacity
- 3.5" HDD form factor
- SATA III interface with 6 Gbit/s transfer rate
- 7200 RPM spindle speed
- 256 MB storage drive buffer size
- Up to 285 MB/s write speed
- 300 TB/year workload rate limit
- Mean Time Between Failures (MTBF) of 1,200,000 hours
- Rated for 24/7 continuous operation
- Includes rotational vibration (RV) sensors
- Supports S.M.A.R.T. drive monitoring
- Idle power consumption of 5.5 W
- Compatible with NAS, PC, and server systems
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- leaflet (English)
- manual pdf (English)

