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861756-B21
HPE 4TB SAS 12G Midline 7.2K LFF (3.5in) SC 1yr Wty 512e HDD
Federal agencies and Fortune 500 operations source through ORM Systems.
US Government & Defense
Enterprise Clients
Regional teams and 25+ distribution partners keep stock near you and accountability in your time zone.
Pay by PayPal or Revolut with full chargeback rights. Order on PO terms, Net-30 for government.
Every registration we claim is public record — check our federal contractor status yourself before you spend a dollar.
Ten years serving buyers who audit their vendors. From federal agencies to 20,000+ enterprise clients worldwide.
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.
861756-B21 price is $303.19, a 70% saving from the Hpe list price of $1,010.64. 861756-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 861756-B21 for additional pricing. Browse the full Hpe Server 3.5" Hard Drives series or explore all Hpe products.
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
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
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
Mon–Fri: [09:00-16:00]
Avg. response under 30 mins
| 861756-B21 |  875476-B21 |  861594-B21 |  Q2P80A |  857648-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 / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage |
| Interface | SATA III | SATA III | SATA III | SATA III | SAS 12Gb/s |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Storage Capacity | 4 TB | 4 TB | 10 TB | 8 TB | 4 TB |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| 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 250 MB/s | Up to 210 MB/s |
| Annual Workload Rating | 300 TB/yr | 300 TB/yr | 550 TB/yr | 180 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8.0 Watts | 7.5 Watts | 8.5 Watts | 8 Watts | 8.5 Watts |
| Power Consumption (Idle) | 5.0 Watts | 5.5 Watts | 5.5 Watts | 5 Watts | 5.2 Watts |
| Encryption Support | No | 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 | 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 | 5–60°C | 5–60°C | 5–60°C | 5–60°C |
| Product Name | 861756-B21 | 875476-B21 Enterprise HDD | 861594-B21 Enterprise Storage HDD | Q2P80A High Performance HDD | 857648-B21 Enterprise Series SAS Hard Drive |
| Height | 1.0 inches | 1.03 inches | 1.03 inches | 1.03 inches | 1.03 inches |
| Width | 5.8 inches | 5.79 inches | 5.79 inches | 5.79 inches | 5.79 inches |
| Depth | 6.9 inches | 4.00 inches | 4.01 inches | 4.00 inches | 4.01 inches |
| Weight | 2.0 lbs | 1.85 lbs | 2.1 lbs | 1.48 lbs | 3.64 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.
Reliable midline SAS drive delivering consistent performance for backups and file storage.
Stable operation and predictable throughput in Gen9 servers.
Good balance between capacity and enterprise reliability.
Installed easily and worked flawlessly in production.
Solid choice for long term data retention.
The HPE 861756-B21 delivers 4 TB of usable capacity, ideal for high-density midline storage applications.
This drive uses a 12 Gb/s Serial Attached SCSI (SAS) interface for reliable, high-throughput connectivity.
The drive spins at 7,200 RPM, balancing performance and energy efficiency for midline workloads.
It is a 3.5-inch large form factor (LFF) drive, compatible with standard enterprise server bays.
Yes, it’s designed for enterprise midline use with enhanced reliability, rotational vibration control, and error recovery features.
The HPE 861756-B21 uses 512e sector emulation for broad compatibility with legacy and modern storage systems.
It includes a 1-year limited warranty backed by HPE’s global support network.
The drive delivers up to 226 MB/s sustained sequential transfer rates over the SAS interface.
Yes, it supports hot-swap installation for zero-downtime drive replacement in compatible HPE servers.
It’s validated for HPE ProLiant DL, ML and Apollo Gen9/Gen10 servers and HPE StorageWorks JBOD enclosures.
Typical power draw is 8.0 W active and 4.0 W idle, optimizing data center energy efficiency.
The drive is rated for a 1.6 million-hour MTBF, ensuring dependable midline storage performance.
It operates between 5 °C to 55 °C, meeting standard data-center environmental ranges.
It’s tailored for nearline and archival storage, sequential workloads, backup systems and bulk data repositories.
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.
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.
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