Overview
The Seagate Exos X18 ST12000NM000J is a 12TB internal enterprise hard drive designed for data centers, enterprise storage arrays, and high-capacity storage infrastructure. It uses a 3.5-inch form factor and SATA 6Gb/s interface for integration into compatible server and storage systems.
As part of the Exos X18 family, this model combines helium-sealed drive construction with conventional magnetic recording (CMR). It is intended for enterprise environments that require high-capacity storage and continuous operation.
Performance and Technical Information
The drive operates at 7200RPM and includes a 256MB cache buffer. Seagate specifies a maximum sustained data transfer rate of up to 270MB/s for the Exos X18 platform under the manufacturer's stated test conditions.
The helium-sealed design reduces internal air resistance. PowerChoice technology supports configurable power management, while PowerBalance technology addresses the relationship between power consumption and performance. SuperParity provides an additional data-integrity feature within the drive's error-correction design.
Interface and Storage Compatibility
The ST12000NM000J is the standard SATA model, with a SATA 6Gb/s interface and a 512e sector format by default. Seagate FastFormat supports conversion between supported 512e and 4Kn formats.
Although the drive uses a standard 3.5-inch form factor, compatibility depends on the host controller, storage enclosure, firmware, supported capacity, and sector-format requirements. SATA and SAS drives are not interchangeable in every storage system.
Key Features
- 12TB storage capacity: Provides high-capacity storage for enterprise data and large repositories.
- Helium-sealed construction: Uses a helium-filled internal environment to reduce air resistance.
- CMR recording: Uses conventional magnetic recording for enterprise storage workloads.
- Power management: Includes Seagate PowerChoice and PowerBalance technologies.
- Enterprise data integrity: Incorporates SuperParity and advanced error-correction capabilities.
Applications
- Enterprise servers and compatible storage arrays.
- Data-center storage infrastructure and high-capacity storage pools.
- Enterprise backup and restore repositories.
- Distributed storage systems and large-scale data repositories.
- Centralized storage deployments requiring compatible SATA enterprise drives.
DC Supplies Product Note
Before deploying this drive in an existing storage array, verify the controller's support for 12TB disks and the required sector format. Seagate documents both 512e and 4Kn support through FastFormat; however, host-controller compatibility and the selected format should be confirmed before initializing the drive or expanding an existing array.
Specifications
| Specification | Details |
|---|
| Brand | Seagate |
| Manufacturer | Seagate Technology |
| Product Family | Exos |
| Series | Exos X18 |
| Part Number / MPN | ST12000NM000J |
| Product Type | Enterprise Internal Hard Drive |
| Storage Capacity | 12TB |
| Form Factor | 3.5-inch |
| Interface | SATA 6Gb/s |
| Spindle Speed | 7200RPM |
| Cache Buffer | 256MB |
| Recording Technology | Conventional Magnetic Recording (CMR) |
| Drive Construction | Helium-sealed |
| Default Sector Format | 512e |
| Supported Sector Formats | 512e and 4Kn through FastFormat |
| Maximum Sustained Data Transfer Rate | Up to 270MB/s |
| Maximum Interface Transfer Rate | 600MB/s |
| Mean Time Between Failures (MTBF) | 2,500,000 hours |
| Annualized Failure Rate (AFR) | 0.35% |
| Nonrecoverable Read Errors | 1 sector per 1015 bits read |
| Power Management | PowerChoice and PowerBalance |
| Hot-Plug Support | Supported with compatible host systems |
| Maximum Operating Temperature | 60°C |
| Dimensions (H × W × D) | 26.11 × 101.85 × 147mm maximum |
| Weight | Approximately 650g, depending on specification reference |
| Limited Warranty | 5 years, subject to applicable terms and eligibility |
Frequently Asked Questions
1. Is the ST12000NM000J a SATA or SAS hard drive?
This exact model is the SATA 6Gb/s version of the Seagate Exos X18 12TB drive. Other Exos X18 part numbers use SAS interfaces, so confirm the complete MPN before ordering.
2. Does this drive support 4Kn formatting?
Yes. Seagate FastFormat supports conversion between 512e and 4Kn sector formats. Confirm compatibility with the host operating system, controller, and storage application before changing the format.
3. Can this drive be installed in a server?
It can be used in servers and storage systems that support 3.5-inch SATA enterprise hard drives. Check the system manufacturer's compatibility documentation and supported drive capacity.
4. Can the drive be used in a RAID array?
It is designed for enterprise storage applications, including compatible storage arrays. Verify controller compatibility, sector-format requirements, and the intended RAID configuration before deployment.
5. Does the drive support hot swapping?
The drive supports hot-plug operation when used with a compatible host system, controller, enclosure, and backplane. The complete system must be designed for hot-plug drive replacement.
6. What warranty applies to this model?
The published Exos X18 specifications list a five-year limited warranty. Actual coverage depends on the drive's eligibility, serial number, region, and applicable manufacturer terms.
