The Seagate ST8000NM0055 is an 8TB enterprise-class hard disk drive from the Exos 7E8 family, also known as Enterprise Capacity 3.5. Designed for compatible enterprise storage environments, it combines a 7200RPM rotational speed, SATA 6Gb/s interface, and 256MB cache in a standard 3.5-inch form factor.
This model uses a 512e sector format, which emulates 512-byte logical sectors on a drive with 4K physical sectors. It is intended for compatible servers, data storage systems, and business applications that require high-capacity mechanical storage.
Key Features
- 8TB storage capacity: Provides substantial storage space for business data, applications, archives, and backups.
- 7200RPM rotational speed: Supports enterprise storage workloads requiring consistent mechanical disk performance.
- SATA 6Gb/s interface: Connects to compatible SATA controllers and storage systems.
- 256MB cache: Provides onboard buffer memory to support drive operations and data transfers.
- Enterprise-class design: Built for demanding storage environments, with manufacturer-rated reliability specifications for enterprise use.
Enterprise Storage Applications
The ST8000NM0055 can be used in compatible servers, business storage systems, and high-capacity data repositories. Its 8TB capacity makes it suitable for environments where storage density is important.
This is a SATA model, not a SAS drive. Before installation, verify that your server or storage enclosure supports 3.5-inch SATA drives, 8TB capacities, and the 512e sector format. Actual performance depends on the system, controller, workload, and drive condition.
Technical Specifications
| Brand | Seagate |
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| Model Number | ST8000NM0055 |
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| Product Family | Exos 7E8 / Enterprise Capacity 3.5 |
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| Drive Type | Internal mechanical hard disk drive (HDD) |
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| Storage Capacity | 8TB |
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| Form Factor | 3.5-inch |
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| Spindle Speed | 7200RPM |
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| Interface | SATA 6Gb/s |
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| Cache Buffer | 256MB |
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| Sector Format | 512e (512-byte emulation) |
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| Maximum Sustained Transfer Rate | Up to 249MB/s |
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| Average Rotational Latency | 4.16ms |
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| Interface Ports | Single SATA port |
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| Average Operating Power | Approximately 11W |
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| Average Idle Power | Approximately 7.6W |
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| Manufacturer-Rated MTBF | 2,000,000 hours |
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| Operating Temperature | 5°C to 60°C ambient |
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| Height | 26.1mm |
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| Width | 101.85mm |
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| Depth | 147mm |
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| Weight | Approximately 780g |
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Frequently Asked Questions
What is the capacity of the Seagate ST8000NM0055?
This model provides 8TB of nominal storage capacity.
Is the ST8000NM0055 a SATA or SAS drive?
The ST8000NM0055 uses a SATA 6Gb/s interface. Check the exact model number because other Exos models may use SAS interfaces.
How fast does this hard drive spin?
The drive operates at 7200RPM.
What does 512e mean?
512e means the drive uses 512-byte logical sectors while its physical sectors are 4K. Confirm that your operating system and storage controller support this format.
Can I install this drive in a desktop computer?
It may work in a compatible computer with a 3.5-inch drive bay, SATA connection, sufficient power, and support for 8TB drives. Check system compatibility before installation.
DC Supplies Product Note
Please confirm the exact model number and compatibility with your equipment before ordering. Product condition and included items may vary by listing. Manufacturer reliability ratings are specifications, not guarantees of the remaining life of an individual used drive.
