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Seagate Exos X18 18TB SAS 12Gb/s 7200RPM 256MB Cache (512e / 4Kn) Enterprise 3.5-inch Internal Hard Drive - ST18000NM004J

Seagate Exos X18 18TB SAS 12Gb/s 7200RPM 256MB Cache (512e / 4Kn) Enterprise 3.5-inch Internal Hard Drive - ST18000NM004J

Part Number: ST18000NM004J
Manufacturer: Seagate

Condition: Refurbished

Weight: 1.4 lbs

AvailabilityIn stock

Regular price $425.00
Regular price Sale price $425.00
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Seagate Exos X18 18TB SAS 12Gb/s Enterprise Hard Drive

The Seagate Exos X18 ST18000NM004J is an 18TB enterprise-class SAS 12Gb/s hard drive in a 3.5-inch form factor. Built for hyperscale data centers and enterprise storage arrays, it delivers up to 270 MB/s sustained transfer rate with dual-port SAS connectivity, 512e/4Kn sector format support, and 2.5 million hour MTBF for maximum reliability in demanding 24/7 environments.

Key Features

  • 18TB enterprise capacity for hyperscale and data center deployments
  • SAS 12Gb/s dual-port — high-availability storage array connectivity
  • 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
  • Seagate Secure encryption option available

Product Specifications

  • Part Number: ST18000NM004J
  • Manufacturer: Seagate
  • OEM Status: Retail
  • Capacity: 18TB
  • Interface: SAS 12Gb/s
  • Form Factor: 3.5-inch
  • Spindle Speed: 7200RPM
  • Cache: 256MB
  • Sector Format: 512e / 4Kn

Storage Specifications

  • Recording Technology: CMR
  • Buffer Size: 256MB
  • SAS Ports: 2 (dual-port)
  • 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

  • Enterprise SAS storage arrays and JBODs
  • Hyperscale data center bulk storage
  • High-availability SAN deployments requiring dual-port SAS
  • Cloud and object storage infrastructure
  • Database and backup storage tiers

Compatibility

  • SAS 12Gb/s and SAS 6Gb/s HBAs and RAID controllers (backward compatible)
  • Enterprise storage arrays supporting 3.5-inch SAS LFF drives
  • Dual-port SAS backplanes for high-availability configurations

Frequently Asked Questions

What is the difference between 512e and 4Kn sector formats?
512e (512 bytes emulation) is compatible with most legacy systems. 4Kn (4096 bytes native) offers better error correction but requires a 4K-aware operating system and controller. The ST18000NM004J supports both.
Does this drive support hardware encryption?
The Seagate Secure version of the Exos X18 supports hardware encryption. Verify the specific SKU suffix for encryption support.
Is dual-port SAS required?
Dual-port SAS enables multipath I/O for high-availability configurations. Single-path SAS connections also work — the second port simply remains unused.

The Seagate Exos X18 ST18000NM004J delivers 18TB of enterprise SAS storage with dual-port SAS 12Gb/s, 270 MB/s sustained throughput, and 2.5 million hour MTBF — a proven high-capacity SAS hard drive for enterprise storage arrays and hyperscale data center 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.