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Dependable midline drive for archival and backup storage.
861678-B21
HPE 4TB SATA 6G Midline 7.2K LFF (3.5in) SC 1yr Warranty HDD
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861678-B21
- Description:
- HPE 4TB SATA 6G Midline 7.2K LFF (3.5in) SC 1yr Warranty HDD
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- Hpe
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- List Price:
$818.42
- Price:
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861678-B21 Overview
861678-B21 is a high-performance HDD engineered in a 3.5-inch form factor with a SATA III interface, spinning at 7200 RPM to deliver a 10 TB capacity and a 256 MB buffer. It is rated for a heavy 550 TB/yr workload and engineered with an outstanding MTBF reliability for continuous enterprise operation.
861678-B21 consumes 8 Watts during read/write operations and 5 Watts in idle mode. Its advanced features include helium-sealed construction, vibration protection, and dual actuators, making it ideal for data centers, desktops, NAS, and surveillance applications.
861678-B21 price is $245.53, a 70% saving from the Hpe list price of $818.42. 861678-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 861678-B21 for additional pricing. Browse the full Hpe Server 3.5" Hard Drives series or explore all Hpe products.
861678-B21 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
- 10 TB
- Spindle Speed (RPM)
- 7200 RPM
- Cache (Buffer Size)
- 256 MB
- Average Latency
- N/A
- Data Transfer Rate
- Up to 250 MB/s
- Annual Workload Rating
- 550 TB/yr
- Power Consumption (Read/Write)
- 8 Watts
- Power Consumption (Idle)
- 5 Watts
- Encryption Support
- AES 256-bit
- Helium Sealed
- Helium-Sealed
- Drive Bays Supported
- Multi-bay
- Vibration Protection
- Yes
- Advanced Features
- Dual Actuator
- Operating Temperature
- 5–60°C
- Product Name
- 861678-B21 Enterprise HDD
- Height
- 1 in
- Width
- 5.8 in
- Depth
- 4 in
- Weight
- 3.6 lbs
861678-B21 Use Case
High-Capacity Backup and Archival for SMB Environments
In a mid-sized finance firm requiring reliable, cost-effective on-premise backups, the HPE 861678-B21 4TB SATA 6G Midline HDD delivers enterprise-grade capacity and 7.2K RPM performance. By integrating eight drives into a RAID-6 array, IT teams achieve a 28 TB usable volume for daily snapshots and long-term archives. Benefits: accelerated restore times, 35% lower TCO versus nearline SSDs, and 1-year HPE warranty ensuring data-protection compliance.
24/7 Video Surveillance Storage for Retail Security
A multi-site retail chain deploying network video recorders (NVRs) for continuous 1080p surveillance uses the HPE 861678-B21 4TB SATA 6G HDD to sustain high-write workloads. The 7.2K RPM and SATA 6 Gb/s interface provide sustained throughput for 30+ cameras per drive, supporting 90 days of footage retention. Benefits: reliable 24/7 operation, reduced drive replacement costs, and enterprise-grade warranty support for uninterrupted security compliance.
Tiered Storage Optimization for Virtual Desktop Infrastructure
An enterprise IT department implementing a 200-seat VDI deployment adds the HPE 861678-B21 4TB SATA 6G Midline HDD as a secondary storage tier for user profiles and shared file repositories. The large-form-factor drives handle peak boot-storm I/O and bulk data storage with consistent 7.2K RPM performance. Benefits: 40% lower capital expenditure compared to all-flash arrays, improved session stability, and simplified maintenance under HPE’s 1-year warranty.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 861678-B21 |  881783-B21 |  P04695-B21 |  801888-B21 |  804668-B21 | |
|---|---|---|---|---|---|
| Product Type | Hard Drive | Hard Drive | Hard Drive | Hard Drive | Hard Drive |
| Drive Type | HDD | HDD | HDD | HDD | HDD |
| Use Case | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance |
| Interface | SATA III | SATA III | SATA III | SAS 12Gb/s | SATA III |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Storage Capacity | 10 TB | 4 TB | 8 TB | 8 TB | 4 TB |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache (Buffer Size) | 256 MB | 256 MB | 256 MB | 256 MB | 128 MB |
| Average Latency | N/A | N/A | N/A | N/A | N/A |
| Data Transfer Rate | Up to 250 MB/s | Up to 210 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s |
| Annual Workload Rating | 550 TB/yr | 550 TB/yr | 180 TB/yr | 550 TB/yr | 300 TB/yr |
| Power Consumption (Read/Write) | 8 Watts | 7.2 Watts | 10 Watts | 7 Watts | 8 Watts |
| Power Consumption (Idle) | 5 Watts | 4 Watts | 6 Watts | 5 Watts | 4 Watts |
| Encryption Support | AES 256-bit | AES 256-bit | AES 256-bit | AES 256-bit | AES 256-bit |
| Helium Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed |
| Drive Bays Supported | Multi-bay | Multi-bay | Multi-bay | Multi-bay | Single / Multi-bay |
| Vibration Protection | Yes | Yes | Yes | Yes | Yes |
| Advanced Features | Dual Actuator | Dual Actuator | Dual Actuator | Dual Actuator | Dual Actuator |
| Operating Temperature | 5–60°C | 0–60°C | 5–60°C | 5–60°C | 5–60°C |
| Product Name | 861678-B21 Enterprise HDD | 881783-B21 | P04695-B21 8TB Enterprise HDD | 801888-B21 | 804668-B21 Enterprise HDD |
| Height | 1 in | 1.03 inches | 1.02 inches | 1.03 inches | 1.03 inches |
| Width | 5.8 in | 4 inches | 5.8 inches | 5.79 inches | 5.79 inches |
| Depth | 4 in | 5.8 inches | 4.0 inches | 4.00 inches | 4.00 inches |
| Weight | 3.6 lbs | 1.3 lbs | 2.2 lbs | 1.5 lbs | 3.5 lbs |
Reviews & Ratings
B
Bilal Javed
4
Quiet operation and steady throughput.
H
Henry Collins
5
Good balance of capacity and reliability.
S
Shahbaz Khan
5
Works well in Gen9 environments.
A
Andreas Vogel
5
Reliable SATA storage option.
Questions & Answers
What is the HPE 4TB SATA 6G Midline 7.2K LFF (3.5in) SC HDD (SKU: 861678-B21)?
The HPE 4TB SATA 6G Midline 7.2K LFF HDD (SKU: 861678-B21) is a high-capacity 3.5-inch hard drive offering 4 TB storage, SATA 6 Gb/s connectivity, 7,200 RPM performance and a one-year HPE warranty.
What are the key specifications of the HPE 861678-B21 HDD?
Key specs: 4 TB capacity, SATA 6 Gb/s interface, 7,200 rpm rotational speed, 3.5-inch LFF form factor, 512e sectors, 1.2 million hours MTBF and one-year limited warranty.
Which HPE servers support this 4TB SATA 6G Midline HDD?
This drive is fully compatible with HPE ProLiant Gen7, Gen8, Gen9 and Gen10 servers featuring SATA backplane bays, including DL, ML and BL series.
What does 'Midline' mean in HPE Midline HDD?
‘Midline’ indicates a nearline-class drive optimized for balanced performance and capacity, ideal for backup, archiving and infrequently accessed data.
Does this HDD support hot-plug installation?
No. The SC (Standard Carrier) version requires server downtime for installation; hot-plug functionality is available only with HPE SmartCarrier (BC) drives.
Can I use this HDD in RAID configurations?
Yes. You can integrate the HPE 861678-B21 into SATA RAID arrays using HPE Smart Array controllers that support SATA drives for data redundancy and performance optimization.
What workloads are ideal for the HPE 4TB SATA Midline HDD?
It excels in sequential workloads such as nearline storage, backup, archiving and media streaming, while being less suited for high-transaction random I/O.
How do I install the HPE SKU 861678-B21 HDD?
Mount the HDD in a compatible 3.5-inch SATA bay, connect the SATA data and power cables, secure the drive bracket and power up the server to recognize the drive.
What warranty does the HPE 4TB SATA 6G Midline HDD include?
This HDD carries a one-year HPE limited warranty covering defects in materials and workmanship, with support available through HPE global services.
What is the power consumption of this HPE 4TB SATA drive?
Typical power consumption is approximately 5.6 W idle and 7.2 W active, ensuring energy efficiency in large-scale server deployments.
How reliable is the HPE 861678-B21 HDD?
With an MTBF of 1.2 million hours and HPE’s rigorous testing, the drive delivers dependable performance for nearline storage applications.
What is the average latency of the HPE 7.2K LFF HDD?
At 7,200 RPM, the drive achieves an average rotational latency of around 4.17 ms, supporting steady sequential data transfers.
Can this SATA HDD be mixed with SAS drives in the same server?
Mixing SATA and SAS drives in the same enclosure is not recommended; use uniform drive types per backplane bay to ensure compatibility and performance.
What is the difference between this SATA HDD and an HPE SAS HDD?
SATA HDDs like 861678-B21 use single-port connections for cost-effective capacity, whereas SAS HDDs offer dual-port reliability, higher throughput and enterprise-class endurance.
Does the HPE 4TB Midline HDD support data encryption?
No. The 861678-B21 is a standard SATA drive without built-in encryption; for secure use cases consider HPE Self-Encrypting Drives (SEDs).
Are firmware updates available for the HPE 4TB SATA 6G Midline HDD?
HPE firmware releases and Smart Component bundles for this model are available via the HPE Support Center to ensure optimal drive performance and compatibility.