861752-X21 HPE 4TB 7.2K RPM 3.5" LFF 512e DS SATA 6GBPS SC Hard Drive

HPE 861752-X21 4TB 3.5inch 6GBPS Hard Drive

The HPE 861752-X21 represents a robust internal storage device engineered for enterprise workloads requiring stable performance, scalable capacity, and long-term reliability. This 4TB Midline Hard Disk Drive integrates a balanced combination of rotational speed, interface efficiency, and enterprise-grade durability. It is optimized for server environments where consistent data availability and cost-effective storage expansion are essential.

General Information

• Brand: HPE
• Manufacturer Part Number: 861752-X21
• Type: Hard Drive

Technical Specifications

• Storage Capacity: 4 TB
• Form Factor: 3.5 inch LFF
• Interface: SATA 6 Gbps
• Bytes per Sector: 512
• Drive Technology: Air (filled)
• Connectivity: Dual-Port
• Hot-Pluggable: Yes
• Format Type: 512n
• Carrier Type: Smart Carrier (SC)
• Workload Type: Midline
• Advanced Features: Advanced Format 512e, Digitally Signed Firmware
• Included with: HPE Smart Carrier (SC)
• Compatible Platforms: HPE ProLiant Rack, Tower, BladeSystem Servers, Synergy

Performance Metrics

• Transfer Rate (External): 6 Gb/sec
• Average Seek Time: 7.45 ms
• Max Seek Time: 14.20 ms
• Track-to-Track Seek Time: 0.32 ms
• Spindle Speed: 7200 RPM

Expansion and Connectivity

• Interface: 1 x SATA 6 Gb/s
• Compatible Bays: 3.5" LFF

Physical Dimensions

• Width: 4.20 inches
• Depth: 6.70 inches
• Height: 1.10 inches

Key Performance Highlights

• 7200 RPM spindle speed for steady data access
• Designed for moderate workload intensity environments
• Reliable sequential and random I/O performance
• Enhanced stability for long-duration server operations

Use Case 

• Data backup and archival storage systems
• Cloud infrastructure cold or warm storage layers
• Enterprise file servers with large dataset handling

Overview of HPE 861752-X21 4TB 6GBPS Hard Drive 

The HPE 861752-X21 4TB 7.2K RPM 3.5inch LFF 512e DS SATA 6Gbps SC Midline Hard Drive represents a reliable and cost-optimized enterprise storage solution engineered for data-intensive server environments. Designed for scalability, consistent performance, and long-term data retention, this midline HDD is widely deployed in enterprise data centers, storage arrays, and business-critical server infrastructures where balanced performance and capacity are essential. Built under Hewlett Packard Enterprise standards, it integrates seamlessly into ProLiant servers and HPE storage systems, ensuring operational stability and compatibility across a wide range of workloads.

The architecture of the HPE 861752-X21 is built around enterprise-grade reliability, ensuring sustained performance under continuous workloads. As a midline hard drive, it bridges the gap between high-performance enterprise drives and large-capacity archival storage solutions. Its design emphasizes endurance, predictable performance patterns, and optimized power consumption, making it suitable for organizations that require dependable storage without the higher cost of performance-tier SAS drives or SSD solutions.

4TB Capacity 

The 4TB storage capacity of this drive provides a balanced solution for organizations requiring scalable storage without excessive hardware expansion. It is particularly effective in environments where large datasets must be stored efficiently while maintaining quick accessibility. The capacity is well-suited for virtualization environments, file storage systems, backup repositories, and cloud-based infrastructure nodes.With optimized sector allocation and intelligent firmware mapping, the drive ensures efficient utilization of the full 4TB capacity. Data distribution across platters is managed to reduce fragmentation and enhance long-term performance consistency. This results in improved read/write cycles and reduced wear on mechanical components over extended operational periods.

7,200 RPM Performance 

The 7.2K RPM spindle speed plays a significant role in balancing performance and reliability. While not as fast as high-performance enterprise SAS drives, it provides sufficient rotational speed to handle mixed workloads efficiently. This makes the HPE 861752-X21 suitable for applications requiring moderate transactional throughput combined with large sequential data operations.Latency is managed through optimized seek algorithms and cache management techniques. The drive ensures that frequently accessed data can be retrieved with minimal delay while maintaining steady throughput for bulk data operations. This balance is critical for environments such as backup systems and enterprise file servers.

SATA 6Gbps Interface Integration

The SATA 6Gbps interface provides a stable and widely compatible connection standard for enterprise servers. It ensures efficient data transfer between storage and system architecture while maintaining backward compatibility with previous SATA generations. This allows seamless integration into existing infrastructure without requiring significant hardware upgrades.With a theoretical maximum transfer rate of 6Gbps, the interface supports smooth data flow for midline workloads. Combined with firmware-level optimization, the drive ensures that bandwidth is effectively utilized during peak data operations. This makes it ideal for environments with consistent but moderate data throughput requirements.

512e Format 

The 512e (512-byte emulation) format used in this drive allows it to maintain compatibility with legacy systems while benefiting from modern storage efficiency improvements. It bridges the gap between traditional 512-byte sector drives and newer 4K native storage architectures.The drive intelligently maps data into 4K physical sectors while presenting a 512-byte logical interface to the system. This ensures compatibility without sacrificing efficiency. Error correction algorithms enhance data integrity by detecting and correcting inconsistencies at the sector level.

LFF 3.5 Inch Form Factor 

The Large Form Factor (LFF) 3.5 inch design provides significant advantages in terms of capacity density and thermal management. Larger platters enable higher data storage capability per drive, reducing the need for excessive drive counts in storage arrays.The physical size of the LFF design allows for improved heat dissipation, which is critical in high-density server racks. Proper airflow management ensures consistent operating temperatures, extending the operational lifespan of the drive.By utilizing LFF slots efficiently, enterprises can maximize storage capacity within limited physical rack space. This contributes to reduced infrastructure complexity and optimized data center design strategies.

Reliability

The HPE 861752-X21 is designed with enterprise reliability in mind, incorporating advanced firmware algorithms that monitor drive health and performance. These mechanisms help predict potential failures and ensure proactive maintenance strategies.Self-Monitoring, Analysis, and Reporting Technology (SMART) is integrated into the drive to continuously evaluate operational conditions. This enables early detection of potential issues such as read errors, temperature fluctuations, and mechanical wear.

Scalability 

The HPE 861752-X21 supports scalable storage architectures where additional drives can be integrated seamlessly into existing arrays. This allows organizations to expand storage capacity incrementally based on demand growth.Enterprises can scale storage systems by adding identical drives, ensuring uniform performance and compatibility across storage nodes. This modular approach simplifies infrastructure planning and long-term expansion.

Compatibility 

The 512e sector type ensures compatibility with legacy systems that rely on older sector sizes, such as 512 bytes per sector. This means that the HPE 861752-X21 Hard Drive can be seamlessly integrated into older systems without any compatibility issues or the need for additional configurations. This is particularly important for users who have systems running older operating systems or applications that are not compatible with newer sector types.