Seagate Exos X18 3.5" 12TB Serial ATA III Internal Hard Drive (ST12000NM000J R)

SKU: ST12000NM001J
Seagate Exos X18 3.5" 12TB Serial ATA III Internal Hard Drive (ST12000NM000J R)

Seagate Exos X18 3.5" 12TB Serial ATA III Internal Hard Drive (ST12000NM000J R)

SKU: ST12000NM001J
Regular price R 8,319.00
  • Low stock - 16 items left
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Seagate Exos X18 ST12000NM000J 12TB HDD; 3.5''; 6GB/s SATA SED Model Fast Format 4Kn/512e; RPM 7200; 5 Year Limited Warranty

More Information

- 12TB Storage Capacity
- 3.5" Form Factor
- SATA III 6 Gb/s Interface
- 256MB Cache
- 7200 RPM
- Sustainable Transfer Rate: Up to 270MB/s
- Random Read 4K QD16: 170 IOPS
- Random Write 4K QD16: 550 IOPS
- MTBF: 2.5 Million Hours
- 0.35% Reliability Rating

Seagate manufactures hard drives that specifically address the demand for hyperscale cloud scalability. As the flagship of the Seagate X class, the Exos X18 enterprise hard drives are the highest-capacity hard drives in the fleet.

Best-Fit Applications

  • Scalable hyperscale applications/cloud data centers
  • Massive scale-out data centers
  • Big data applications
  • High-capacity density RAID storage
  • Mainstream enterprise external storage arrays
  • Distributed file systems, including Hadoop and Ceph
  • Enterprise backup and restore— D2D, virtual tape
  • Centralized surveillance

Technical Specs

Brand Seagate
Series Exos X18
Model ST12000NM000J
Capacity 12TB
Features Helium Sealed-Drive Design
Conventional Magnetic Recording (CMR)
Super Parity
Low Halogen
PowerChoice Idle Power Technology
PowerBalance Power/Performance Technology
Hot-Plug Suppor
Organic Solderability Preservative
RSA 3072 Firmware Verification (SD&D)
Cache 256MB
Reliability/Data Integrity
Mean Time Between Failures (MTBF) 2,500,000 Hours
Reliability Rating @ Full 24x7 Operation (AFR) 0.35%
Nonrecoverable Read Errors per Bits Read 1 sector per 10E15
Power-On Hours per Year (24x7) 8760
512e Sector Size (Bytes per Sector) 512
4Kn Sector Size (Bytes per Sector) 4096
Spindle Speed 7200RPM
Interface Access Speed 6.0, 3.0
Max. Sustained Transfer Rate OD 270MB/s
Random Read/Write 4K QD16 WCD (IOPS) 170/550
Average Latency (ms) 4.16ms
Rotation Vibration @ 20-1500 Hz 12.5Rad//sec²
Power Consumption
Idle A (Average) 4.4W
Max Operating, Random Read/Write 4K/16Q 8.6W, 5.8W
Power Supply Requirements 12 V and 5 V
Operating Temperature 5°C - 60°C
Nonoperating Vibration 2.27Grms
Operating Shock 50Gs
Nonoperating Shock 200Gs
Dimensions 26.1mm x 101.85mm x 147.0mm
Weight 650g

Please Note: We rely that the relevant manufacturers provide adequate information for the products we promote. Errors and Omissions could be expected.


Delivery Locations & Estimations

Johannesburg, Pretoria Area
Delivery time: 1-3 working days
Cape Town, Durban Area
Delivery time: 2-4 working days
Outlying Areas
Delivery time: 3-5 working days

Our picking, packing and delivery is linked to what you order, where you want it delivered and how you choose to pay, so delivery times can vary. Estimates are provided below to help you shop. Once your order has been picked, you will receive a tracking number*.

Certain Gauteng orders go out with local couriers.

Yes. If you want to collect your order, send us an email on with your request and we will gladly assist.

Yes, all of our products come out with their factory set warranty (normally 12 months) unless stated otherwise.

You can contact us on and initiate a return. Should the product be defective, we will schedule a courier. If the return is "change of mind", a delivery address will be provided and you, the client, must courier it back to us.

Learn more: Return Policy

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