Seagate ST18000NM000J

Overview

The Seagate ST18000NM000J is an 18TB internal hard drive designed for enterprise environments that demand reliable, high-capacity storage. It fits into any standard 3.5-inch bay and connects via a SATA III 6 Gb/s interface, making it easy to expand storage in servers or data center racks. With a spindle speed of 7200 RPM and a sustained throughput of up to 270 MB/s, this drive supports fast data access and efficient handling of large workloads.

Key features

• Large 18TB capacity provides ample space for extensive data storage needs such as archiving, backup, and content delivery.
• Helium-sealed enclosure reduces internal friction and vibration, which lowers power consumption and enhances drive longevity.
• PowerBalance technology optimizes energy use per terabyte, helping to manage power budgets in dense server environments.
• On-board thermal and environmental sensors continuously monitor conditions to maintain performance and protect the drive under heavy workloads.
• Designed for 24/7 operation with a 2.5 million-hour mean time between failures (MTBF), ensuring dependable service in demanding data center applications.
• 256 MB cache smooths burst data transfers, improving responsiveness during intensive read/write operations.

Key specs

• Capacity: 18 TB
• Interface: SATA III 6 Gb/s
• Form factor: 3.5 inch
• Spindle speed: 7200 RPM
• Sustained throughput: up to 270 MB/s
• Cache size: 256 MB
• MTBF: 2.5 million hours
• Designed for continuous 24/7 operation

Connectivity and compatibility

This hard drive connects through a SATA III 6 Gb/s interface, which is widely supported by most server motherboards and storage controllers. Its standard 3.5-inch form factor ensures compatibility with common server bays and storage enclosures, making it a straightforward choice for scaling existing infrastructure without requiring specialized hardware.

Performance and reliability

The 7200 RPM spindle speed combined with a large 256 MB cache enables consistent and predictable performance, even during heavy data transfers. The helium-sealed design reduces mechanical wear and vibration, which contributes to the drive’s long lifespan and stable operation. Continuous monitoring through digital sensors helps prevent overheating and environmental stress, making it well suited for dense rack environments where airflow and temperature control are critical.

Ideal uses and environments

This drive is well suited for data centers, private cloud storage, and enterprise backup systems that require large capacity and reliable uptime. It supports workloads such as video archiving, distributed file systems, and object storage, where both capacity and consistent performance are essential. Its energy-efficient design also makes it a practical option for organizations looking to reduce power consumption without sacrificing storage density.

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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.

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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.

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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.

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