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861756-B21
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- HPE 4TB SAS 12G Midline 7.2K LFF (3.5in) SC 1yr Wty 512e HDD
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861756-B21
HPE 4TB SAS 12G Midline 7.2K LFF (3.5in) SC 1yr Wt...
$1,010.64
$303.19
50 in Global Warehouse
$303.19
70% off
TRUSTED, TRIED, PROVEN
861756-B21 Overview
861756-B21 is a high-performance HDD engineered for critical storage needs. This drive features a 3.5-inch form factor with a SATA III interface, spinning at 7200 RPM to deliver a 4 TB capacity paired with a 128 MB cache. It is built to sustain an annual workload rating of 300 TB/yr, ensuring robust performance with an MTBF of 1,000,000 hours and reliable operation rated for continuous use.
861756-B21 incorporates advanced features such as a helium-sealed design, vibration protection, and dual actuator technology, making it ideal for multi-bay deployments. Common use cases include data centers, desktops, NAS, and surveillance systems, positioning the drive for versatile applications across desktop, server, and enterprise storage environments.
What is the price of 861756-B21?
Lowest price of 861756-B21 is $ 303.19. Shop now! Get further exclusive discounts with bulk quotation on 861756-B21
Explore more options from Hard Drives & Ssds or explore other Hpe products.
861756-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 | 4 TB |
| Spindle Speed (RPM) | 7200 RPM |
| Cache (Buffer Size) | 128 MB |
| Average Latency | N/A |
| Data Transfer Rate | Up to 210 MB/s |
| Annual Workload Rating | 300 TB/yr |
| Power Consumption (Read/Write) | 8.0 Watts |
| Power Consumption (Idle) | 5.0 Watts |
| Encryption Support | No |
| Helium Sealed | Helium-Sealed |
| Drive Bays Supported | Multi-bay |
| Vibration Protection | Yes |
| Advanced Features | Dual Actuator |
| Operating Temperature | 5–60°C |
| Product Name | 861756-B21 |
| Height | 1.0 inches |
| Width | 5.8 inches |
| Depth | 6.9 inches |
| Weight | 2.0 lbs |
861756-B21 Use Case
Enterprise Data Archival and Regulatory Compliance
Scenario: Deploy the 861756-B21-HPE 4TB SAS 12G Midline 7.2K LFF HDD in HPE ProLiant DL380 Gen10 servers to build a high-capacity, audit-ready archive that meets legal and industry retention mandates. Benefit: The 12Gb/s SAS interface and robust 7.2K RPM midline design deliver reliable sequential write performance and data integrity, while 4 TB per drive minimizes rack footprint and lowers total cost of ownership. Key Outcomes: • Scalable, compliance-grade data retention • Reduced TCO via cost-effective midline drives • Enterprise reliability with 1-year HPE factory warranty
Accelerated VM Backup and Recovery in Virtualized Environments
Scenario: Integrate the 861756-B21-HPE HDD as a target tier in HPE MSA storage arrays for nightly VMware vSphere backups and snapshots. Its 512e sector format optimizes block handling, while the 12 Gb/s SAS link accelerates data transfer during backup windows. Benefit: Dramatically reduced RTO/RPO and simplified management through faster snapshot creation and restoration. Key Outcomes: • Up to 30% faster backup/restore cycles • Consolidated VM storage for hybrid cloud deployments • Predictive health monitoring via HPE InfoSight
Cost-Effective Tiered Storage for Big Data Analytics
Scenario: Deploy the 861756-B21-HPE 4TB SAS 12G Midline HDD as a capacity tier in HPE Apollo 4200 servers for Hadoop, Spark and NoSQL data lakes. The 7.2K RPM drives store infrequently accessed datasets with high reliability at lower cost. Benefit: Enables petabyte-scale analytics at midline price points without sacrificing data throughput or operational efficiency. Key Outcomes: • Scalable, high-density storage for cluster expansion • Lower power consumption compared to high-rpm alternatives • Seamless integration with HPE OneView for streamlined orchestration
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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| Advanced Features | Dual Actuator | Dual Actuator | Dual Actuator | Dual Actuator | Dual Actuator |
| Annual Workload Rating | 300 TB/yr | 300 TB/yr | 550 TB/yr | 550 TB/yr | 180 TB/yr |
| Average Latency | N/A | N/A | N/A | N/A | N/A |
| Cache (Buffer Size) | 128 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Data Transfer Rate | Up to 210 MB/s | Up to 210 MB/s | Up to 250 MB/s | Up to 210 MB/s | Up to 250 MB/s |
| Depth | 6.9 inches | 4.00 inches | 4.01 inches | 4.01 inches | 4.00 inches |
| Drive Bays Supported | Multi-bay | Multi-bay | Multi-bay | Multi-bay | Multi-bay |
| Drive Type | HDD | HDD | HDD | HDD | HDD |
| Encryption Support | No | AES 256-bit | AES 256-bit | AES 256-bit | AES 256-bit |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Height | 1.0 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 | SATA III | SATA III | SAS 12Gb/s | SATA III |
| Operating Temperature | 5–60°C | 5–60°C | 5–60°C | 5–60°C | 5–60°C |
| Power Consumption (Idle) | 5.0 Watts | 5.5 Watts | 5.5 Watts | 5.2 Watts | 5 Watts |
| Power Consumption (Read/Write) | 8.0 Watts | 7.5 Watts | 8.5 Watts | 8.5 Watts | 8 Watts |
| Product Name | 861756-B21 | 875476-B21 Enterprise HDD | 861594-B21 Enterprise Storage HDD | 857648-B21 Enterprise Series SAS Hard Drive | Q2P80A High Performance HDD |
| 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 | 4 TB | 4 TB | 10 TB | 4 TB | 8 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 | 2.0 lbs | 1.85 lbs | 2.1 lbs | 3.64 lbs | 1.48 lbs |
| Width | 5.8 inches | 5.79 inches | 5.79 inches | 5.79 inches | 5.79 inches |
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Questions & Answers
Q
What is the storage capacity of the HPE 861756-B21 HDD?
A
The HPE 861756-B21 delivers 4 TB of usable capacity, ideal for high-density midline storage applications.
Q
Which interface does the HPE 4TB SAS 12G Midline HDD use?
A
This drive uses a 12 Gb/s Serial Attached SCSI (SAS) interface for reliable, high-throughput connectivity.
Q
What is the rotational speed of this HPE HDD?
A
The drive spins at 7,200 RPM, balancing performance and energy efficiency for midline workloads.
Q
What is the form factor of the HPE 861756-B21?
A
It is a 3.5-inch large form factor (LFF) drive, compatible with standard enterprise server bays.
Q
Is the HPE 4TB SAS HDD enterprise-grade?
A
Yes, it’s designed for enterprise midline use with enhanced reliability, rotational vibration control, and error recovery features.
Q
What sector format does this drive use?
A
The HPE 861756-B21 uses 512e sector emulation for broad compatibility with legacy and modern storage systems.
Q
What is the warranty on the HPE 861756-B21 HDD?
A
It includes a 1-year limited warranty backed by HPE’s global support network.
Q
What is the typical sustained data transfer rate?
A
The drive delivers up to 226 MB/s sustained sequential transfer rates over the SAS interface.
Q
Is this HDD hot-pluggable?
A
Yes, it supports hot-swap installation for zero-downtime drive replacement in compatible HPE servers.
Q
Which HPE server lines is this drive compatible with?
A
It’s validated for HPE ProLiant DL, ML and Apollo Gen9/Gen10 servers and HPE StorageWorks JBOD enclosures.
Q
What are the typical power consumption figures?
A
Typical power draw is 8.0 W active and 4.0 W idle, optimizing data center energy efficiency.
Q
What is the mean time between failures (MTBF)?
A
The drive is rated for a 1.6 million-hour MTBF, ensuring dependable midline storage performance.
Q
What operating temperatures does this HDD support?
A
It operates between 5 °C to 55 °C, meeting standard data-center environmental ranges.
Q
What workload is this midline HDD optimized for?
A
It’s tailored for nearline and archival storage, sequential workloads, backup systems and bulk data repositories.
Q
How do I install the HPE 861756-B21 in my server?
A
Slide the drive into an available 3.5″ SAS bay in your HPE server chassis, secure the latch, and configure it in your RAID controller or HPE Smart Array.
Q
What makes nearline SAS drives different from enterprise SAS drives?
A
Nearline SAS drives balance cost and capacity with 7,200 RPM speeds, compared to higher-speed 10K/15K RPM enterprise SAS drives designed for random I/O.
