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861678-B21
HPE 4TB SATA 6G Midline 7.2K LFF (3.5in) SC 1yr Warranty HDD
Trusted by the Highest-Stakes Buyers
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Since 2016, Enterprise-Trusted
Ten years serving buyers who audit their vendors. From federal agencies to 20,000+ enterprise clients worldwide.
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.
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.
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.
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.
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| 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 |
| 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 |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Dependable midline drive for archival and backup storage.
Quiet operation and steady throughput.
Good balance of capacity and reliability.
Works well in Gen9 environments.
Reliable SATA storage option.
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.
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.
This drive is fully compatible with HPE ProLiant Gen7, Gen8, Gen9 and Gen10 servers featuring SATA backplane bays, including DL, ML and BL series.
‘Midline’ indicates a nearline-class drive optimized for balanced performance and capacity, ideal for backup, archiving and infrequently accessed data.
No. The SC (Standard Carrier) version requires server downtime for installation; hot-plug functionality is available only with HPE SmartCarrier (BC) drives.
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.
It excels in sequential workloads such as nearline storage, backup, archiving and media streaming, while being less suited for high-transaction random I/O.
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.
This HDD carries a one-year HPE limited warranty covering defects in materials and workmanship, with support available through HPE global services.
Typical power consumption is approximately 5.6 W idle and 7.2 W active, ensuring energy efficiency in large-scale server deployments.
With an MTBF of 1.2 million hours and HPE’s rigorous testing, the drive delivers dependable performance for nearline storage applications.
At 7,200 RPM, the drive achieves an average rotational latency of around 4.17 ms, supporting steady sequential data transfers.
Mixing SATA and SAS drives in the same enclosure is not recommended; use uniform drive types per backplane bay to ensure compatibility and performance.
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.
No. The 861678-B21 is a standard SATA drive without built-in encryption; for secure use cases consider HPE Self-Encrypting Drives (SEDs).
HPE firmware releases and Smart Component bundles for this model are available via the HPE Support Center to ensure optimal drive performance and compatibility.
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