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ST6000NM021A
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- Seagate Enterprise ST6000NM021A internal hard drive 3.5" 6000 GB Serial ATA III(ST6000NM021A)
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3 Year Extended Warranty
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Our best-in-class warranties
3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
Service Boundaries & Exclusions
What’s covered — and what’s best avoided.
Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
Know your location’s service type.
In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
Minimal documentation required.
To initiate service, just submit the invoice and warranty card — no red tape, no waiting.
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Return any product within 14 days of delivery if it doesn’t meet your technical or operational needs.
Initiate returns with ease.
Our RMA process is streamlined — just raise a request, follow the packaging guidelines, and we’ll handle the rest.
Refund or restock, your call.
Changed your mind? Get a refund (restocking fees may apply) or swap with another product.
30-Day Hardware Replacement
Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
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ST6000NM021A Overview
ST6000NM021A is a high-performance HDD engineered for enterprise and data center applications, featuring a 3.5-inch form factor with a SATA III interface. It delivers a robust 6 TB of storage capacity, operates at 7200 RPM, and is equipped with a 256 MB cache to efficiently handle intensive workloads of up to 550 TB/yr with an MTBF of 2,000,000 hours, ensuring long-term reliability and continuous 24/7 operation.
ST6000NM021A incorporates advanced design elements including a helium-sealed architecture that minimizes internal friction and enhances thermal efficiency, along with integrated vibration protection to maintain peak performance in multi-drive environments. Ideal for use in data centers, servers, NAS systems, and surveillance applications, it also offers optimized power consumption with approximately 8.9 Watts during read/write operations and 6.5 Watts in idle mode.
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ST6000NM021A Specifications
| Product Type | Hard Drive |
| Drive Type | HDD |
| Use Case | Desktop / Server / NAS / Surveillance / Enterprise Storage |
| Interface | SATA III |
| Form Factor | 3.5-inch |
| Storage Capacity | 6 TB |
| Spindle Speed (RPM) | 7200 RPM |
| Cache (Buffer Size) | 256 MB |
| Average Latency | N/A |
| Data Transfer Rate | N/A |
| Annual Workload Rating | 550 TB/yr |
| Power Consumption (Read/Write) | 8.9 Watts |
| Power Consumption (Idle) | 6.5 Watts |
| Encryption Support | No |
| Helium Sealed | Helium-Sealed |
| Drive Bays Supported | Multi-bay |
| Vibration Protection | Yes |
| Advanced Features | N/A |
| Operating Temperature | 5–60°C |
| Product Name | ST6000NM021A |
| Height | 1.03 inches |
| Width | 5.79 inches |
| Depth | 4.00 inches |
| Weight | 1.6 lbs |
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| Advanced Features | Rotational Vibration Sensors | Rotational Vibration Sensors | N/A | Dual Actuator | Dual Actuator |
| Annual Workload Rating | 550 TB/yr | 550 TB/yr | 550 TB/yr | 300 TB/yr | 180 TB/yr |
| Average Latency | N/A | N/A | N/A | N/A | N/A |
| Cache (Buffer Size) | 256 MB | 256 MB | 256 MB | 64 MB | 256 MB |
| Data Transfer Rate | Up to 250 MB/s | Up to 250 MB/s | N/A | Up to 210 MB/s | Up to 210 MB/s |
| Depth | 4.01 inches | 5.79 inches | 4.00 inches | 5.79 inches | 4.11 inches |
| Drive Bays Supported | Multi-bay | Multi-bay | Multi-bay | Multi-bay | Multi-bay |
| Drive Type | HDD | HDD | HDD | HDD | HDD |
| Encryption Support | AES 256-bit | AES 256-bit | No | AES 256-bit | AES 256-bit |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Height | 1.03 inches | 1.03 inches | 1.03 inches | 1.03 inches | 1.03 inches |
| Helium Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed |
| Interface | SATA III | SAS 12Gb/s | SATA III | SATA III | SATA III |
| Operating Temperature | 5–60°C | 5–60°C | 5–60°C | 5–60°C | 5–55°C |
| Power Consumption (Idle) | N/A | 6.0 Watts | 6.5 Watts | 5 Watts | 4 Watts |
| Power Consumption (Read/Write) | N/A | 8.9 Watts | 8.9 Watts | 8 Watts | 8 Watts |
| Product Name | ST8000VX004 8TB Enterprise HDD | Seagate Exos X12 12TB Enterprise Hard Drive | ST6000NM021A | ST600MM0009 600GB 7200 RPM Enterprise HDD | XS3840TE70004 |
| Product Type | Hard Drive | Hard Drive | Hard Drive | Hard Drive | Hard Drive |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Storage Capacity | 8 TB | 12 TB | 6 TB | 600 GB | 4 TB |
| Use Case | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage |
| Vibration Protection | Yes | Yes | Yes | Yes | Yes |
| Weight | 1.80 lbs | 2.00 lbs | 1.6 lbs | 2.07 lbs | 1.2 lbs |
| Width | 5.79 inches | 4.00 inches | 5.79 inches | 4 inches | 5.79 inches |
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Questions & Answers
Q
What is the storage capacity of the Seagate Enterprise ST6000NM021A internal hard drive?
A
The Seagate Enterprise ST6000NM021A delivers 6TB (6000 GB) of raw storage, ideal for high-density data centers and enterprise applications.
Q
What interface does the ST6000NM021A use?
A
The ST6000NM021A uses a SATA III (6 Gb/s) interface, ensuring broad compatibility and high-speed data transfers.
Q
What form factor is the ST6000NM021A?
A
This drive is a 3.5-inch form factor hard disk drive, designed for standard enterprise servers and storage enclosures.
Q
What are the performance specifications of the ST6000NM021A?
A
The ST6000NM021A spins at 7200 RPM, delivers up to 255 MB/s sustained transfer rates, and features a 256 MB cache for optimized I/O performance.
Q
What is the workload rating for the ST6000NM021A?
A
The Seagate Enterprise ST6000NM021A is rated for 550 TB/year workload, suitable for 24×7 enterprise environments.
Q
What is the mean time between failures (MTBF) for the ST6000NM021A?
A
This hard drive offers an MTBF of 2.5 million hours, reflecting enterprise-class reliability and endurance.
Q
Does the ST6000NM021A support RAID configurations?
A
Yes, the ST6000NM021A is RAID-certified and optimized for multi-drive arrays in enterprise RAID systems.
Q
What cache size does the ST6000NM021A have?
A
The drive features a 256 MB DRAM cache buffer, speeding up sequential and random data access.
Q
What warranty is offered with the Seagate Enterprise ST6000NM021A?
A
Seagate provides a five-year limited warranty on the ST6000NM021A, covering defects and hardware failures.
Q
What is the power consumption of the ST6000NM021A?
A
Typical power usage is 7.8 W during read/write operations and 5.3 W in idle mode, optimizing energy efficiency.
Q
What are the operating temperature and environmental tolerances?
A
The drive operates between 5 °C and 60 °C and can endure non-operating temperatures from –40 °C to 70 °C.
Q
Is the ST6000NM021A suitable for 24/7 operation?
A
Yes, the ST6000NM021A is designed for continuous operation in enterprise data centers with a 24×7 workload rating.
Q
Does the ST6000NM021A support hardware encryption?
A
This model does not include built-in hardware encryption; for secure drive options, consider Seagate’s encrypted Enterprise drives.
Q
What are common use cases for the ST6000NM021A?
A
Ideal use cases include database storage, virtualization, cloud environments, backup and archival, and high-performance computing.
Q
How do I install the Seagate Enterprise ST6000NM021A?
A
Mount the 3.5″ drive in an available bay, connect the SATA III data cable and power cable, then configure it in your server or storage OS.
Q
Which operating systems support the ST6000NM021A?
A
The ST6000NM021A is compatible with all major OS platforms supporting SATA drives, including Windows Server, Linux distributions, and VMware.
