HPE 861590-B21 3.5" 7.2K RPM SAS 12Gbp/s Midline SC 8TB HDD

Overview

The HP 861590-B21 is an 8TB internal hard drive designed for servers and storage arrays that require a balance of capacity, performance, and uptime. It features a 12 Gb/s Serial Attached SCSI (SAS) interface for fast data transfer, making it suitable for streaming large backup sets, running online transaction processing, or supporting virtual machines. With a rotational speed of 7200 RPM and an average seek time of 8 ms, this drive ensures applications start quickly and respond smoothly even under heavy workloads.

Its 3.5-inch form factor fits seamlessly into HP ProLiant systems and other standard SAS backplanes. The hot-swappable design allows for drive replacement or addition without shutting down the server, minimizing downtime in critical environments. Built with midline engineering, it emphasizes high availability and data integrity, making it a reliable choice for file servers, analytics nodes, media archives, and other demanding storage needs.

Key features

• Large 8TB capacity to store extensive databases, backups, and multimedia files without frequent upgrades
• High-bandwidth 12 Gb/s SAS interface that supports demanding workloads with fast data flow
• 7200 RPM rotational speed delivers consistent and dependable throughput for steady performance
• Hot-swappable design enables drive replacement or expansion without interrupting server operation
• Average seek time of 8 ms reduces latency, helping applications respond quickly during peak demand
• Midline construction prioritizes data integrity and high availability for business-critical environments
• 3.5-inch form factor ensures compatibility with standard enterprise drive bays and simplifies integration

Key specs

• Capacity: 8 TB
• Interface: 12 Gb/s Serial Attached SCSI (SAS)
• Rotational speed: 7200 RPM
• Average seek time: 8 ms
• Form factor: 3.5-inch
• Hot-swappable: Yes

Connectivity and compatibility

This hard drive connects via a 12 Gb/s SAS interface, which is widely supported in enterprise-grade servers and storage arrays. It fits into standard 3.5-inch drive bays, making it compatible with HP ProLiant systems and other industry-standard SAS backplanes. The hot-swappable feature allows IT teams to maintain and upgrade storage without downtime, which is essential for environments that require continuous availability.

Ideal uses and environments

The HP 861590-B21 is well suited to environments where large-scale storage capacity and reliable performance are critical. It works effectively in file servers, backup systems, analytics nodes, and media archives. IT professionals in education, healthcare, cloud hosting, and enterprise data centers will find this drive a practical solution for expanding RAID arrays, staging backups, or consolidating departmental data without complex infrastructure changes.