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Seagate Exos X18 18TB SATA 6Gb/s 7200RPM 256MB Cache (512e / 4Kn) Enterprise 3.5-inch Internal Hard Drive - ST18000NM000J

Seagate Exos X18 18TB SATA 6Gb/s 7200RPM 256MB Cache (512e / 4Kn) Enterprise 3.5-inch Internal Hard Drive - ST18000NM000J

Part Number: ST18000NM000J
Manufacturer: Seagate

Condition: Refurbished

Weight: 1.45 lbs

AvailabilityIn stock

Regular price $510.72
Regular price Sale price $510.72
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Seagate Exos X18 18TB SATA 6Gb/s Enterprise Hard Drive

The Seagate Exos X18 ST18000NM000J is an 18TB enterprise-class SATA 6Gb/s hard drive built for hyperscale data centers and enterprise storage infrastructure. With up to 270 MB/s sustained transfer rate, 512e/4Kn sector format flexibility, and a 2.5 million hour MTBF, it delivers the capacity and reliability required for demanding 24/7 storage environments.

Key Features

  • 18TB enterprise capacity for hyperscale and data center deployments
  • SATA 6Gb/s interface for broad server and storage compatibility
  • Up to 270 MB/s sustained transfer rate
  • 512e and 4Kn sector format support
  • 2.5 million hour MTBF — enterprise-grade reliability
  • PowerChoice and PowerBalance technology for energy efficiency
  • 7200RPM with 256MB cache

Product Specifications

  • Part Number: ST18000NM000J
  • Manufacturer: Seagate
  • OEM Status: Retail
  • Capacity: 18TB
  • Interface: SATA 6Gb/s
  • Form Factor: 3.5-inch
  • Spindle Speed: 7200RPM
  • Cache: 256MB
  • Sector Format: 512e / 4Kn

Storage Specifications

  • Recording Technology: CMR
  • Buffer Size: 256MB
  • Average Latency: 4.16ms

Performance Specifications

  • Max Sustained Transfer Rate: Up to 270 MB/s
  • MTBF: 2.5 million hours
  • AFR: 0.35%
  • Workload Rate: 550TB/year
  • Warranty: 5-year limited

Use Cases

  • Hyperscale data center bulk and cold storage
  • Enterprise NAS and object storage deployments
  • Cloud storage infrastructure requiring high-capacity SATA drives
  • Backup and archival storage tiers
  • High-density storage server builds

Compatibility

  • Compatible with SATA 6Gb/s and SATA 3Gb/s controllers (backward compatible)
  • Fits standard 3.5-inch LFF drive bays in servers and storage enclosures
  • Compatible with enterprise NAS and storage arrays supporting SATA LFF drives

Frequently Asked Questions

What is the difference between ST18000NM000J (SATA) and ST18000NM004J (SAS)?
The ST18000NM000J uses SATA 6Gb/s (single-port), while the ST18000NM004J uses SAS 12Gb/s (dual-port). SAS offers higher reliability and multipath I/O for enterprise storage arrays. Choose SATA for cost-effective bulk storage and SAS for high-availability enterprise arrays.
Does this drive use SMR or CMR?
The Exos X18 uses CMR (Conventional Magnetic Recording), ensuring consistent write performance for enterprise workloads.
Is TLER supported?
Yes, the Exos X18 supports TLER (Time-Limited Error Recovery), making it suitable for RAID configurations where extended error recovery can cause drive dropouts.

The Seagate Exos X18 ST18000NM000J delivers 18TB of enterprise SATA storage with 270 MB/s sustained throughput, CMR recording, and 2.5 million hour MTBF — a proven high-capacity SATA hard drive for hyperscale data centers and enterprise bulk storage deployments.

Frequently Asked Questions

Why do I see an incorrect image for this item?

Product images are meant for illustrative purposes alone, and you may not always see the original image.

What do you mean by term Refurbished?

Refurbished means a used computer part or device that has been cleaned, checked, and repaired to make sure it works properly again. Unlike regular second-hand items, refurbished products go through testing and fixing so they can perform like new.

How many days does it take to ship goods to customers?

All orders are processed within 1-2 business days. Orders placed on weekends or public holidays will be processed on the next business day. For more info visit shipping policy.

What is your return policy?

Our Return Policy comprises a 30-day warranty for Refurbished products. There will be a restocking fee applied when you return non-defective returns. For further details, kindly take a look at our Return Policy page.

Do you deliver my ordered items in their original retail box?

For Brand New items, you will receive them in their original retail box. For Refurbished items, you will receive them in a Brown Box or Bulk Packaging.

Do your printers come with ink cartridges?

Refurbished printers do not come with ink cartridges or toners.