Seagate ST20000NM002H

Overview

The Seagate ST20000NM002H is a 3.5-inch internal hard drive designed to deliver 20 TB of storage capacity with a 7200 rpm spindle speed. It connects via a SATA III 6 Gb/s interface and offers sustained transfer rates up to 285 MB/s, supported by a 512 MB cache. This drive is built to fit seamlessly into existing server trays and storage arrays, making it a practical choice for expanding storage pools or replacing smaller drives without infrastructure changes.

Engineered for demanding environments such as hyperscale data centers, cloud storage clusters, and enterprise RAID arrays, it operates continuously with a focus on reliability and energy efficiency. The helium-sealed design reduces internal air resistance, lowering power consumption and helping maintain cooler temperatures in dense rack setups.

Key features

• Large 20 TB capacity supports extensive data storage needs for enterprise and cloud applications
• 7200 rpm spindle speed combined with a 512 MB cache enables fast access to large datasets and smooth data transfers
• Helium-sealed enclosure reduces power draw and operating temperature, enhancing drive longevity and performance in tight spaces
• Designed for continuous 24/7 operation with a mean time between failures (MTBF) of 2.5 million hours, ensuring dependable uptime
• PowerBalance technology optimizes energy efficiency per terabyte without compromising throughput, helping reduce operational costs
• SATA III 6 Gb/s interface ensures compatibility with existing enterprise backplanes and servers for easy integration

Key specs

• Capacity: 20 TB
• Form factor: 3.5 inch
• Spindle speed: 7200 rpm
• Interface: SATA III 6 Gb/s
• Cache size: 512 MB
• Sustained transfer rate: up to 285 MB/s
• Mean time between failures (MTBF): 2.5 million hours
• Enclosure: helium-sealed

Connectivity and compatibility

This hard drive uses a SATA III 6 Gb/s interface, which is widely supported across enterprise servers and storage arrays. It fits standard 3.5-inch bays, allowing straightforward installation in most rack-mounted or tower systems without requiring adapter trays or special connectors. Its compatibility with existing infrastructure makes it a convenient upgrade or expansion option for data centers and IT environments.

Performance and reliability

The combination of a 7200 rpm spindle speed and a large 512 MB cache ensures that data access and transfer remain efficient even under heavy workloads. The helium-sealed design reduces friction and heat generation, which contributes to longer drive life and stable performance in dense storage configurations. With a 2.5 million hour MTBF rating, this drive is built to handle continuous operation, making it suitable for mission-critical applications where downtime is not an option.

Ideal uses and environments

This drive is well suited to hyperscale and scale-out data centers, cloud storage clusters, and enterprise RAID arrays that require large, reliable storage pools. It supports workloads such as object storage, backup repositories, video archiving, and big-data analytics. Operators who prioritize energy efficiency and predictable operating costs will find the PowerBalance technology particularly beneficial in large installations.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

Learn more

Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, and include all tags, manuals, accessories, and original, unaltered packaging. To start a return, please email us for approval. Items sent back without approval may be refused or returned to the sender. If any item is kept, its value will be deducted from the refund.

Non-returnable items include opened TVs, combos, or monitors 37″ or larger, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method. Please allow 5–7 business days for the credit to post. Shipping and handling are nonrefundable. If an item is used, incomplete, or not in its original condition, a 30% restocking fee may apply. Direct exchanges are not offered. To exchange an item, please purchase the replacement separately and return the original for a refund.

Learn more

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

Learn more