Power Through Enterprise Workloads with the HPE 574758-B21 600GB 15K RPM SAS Hard Drive for ProLiant Gen2 to Gen7 Servers

HPE 574758-B21 600GB 15000 RPM 3.5-Inch SAS-6Gbps Dual Port Enterprise Hard Drive: The Complete Buyer's Guide

Enterprise IT teams running legacy and mid-life ProLiant servers face a recurring challenge: finding storage upgrades that are fast, reliable, and fully compatible with older hardware generations. The HPE 574758-B21 is a 600GB, 15,000 RPM, 3.5-inch Large Form Factor (LFF) SAS hard drive built specifically to solve this problem. Designed for enterprise workloads and backed by dual-port connectivity, this drive remains one of the most trusted storage components for HPE ProLiant Generation 2 through Generation 7 servers.

This guide covers everything you need to know about the HPE 574758-B21 — from its technical specifications to real-world use cases, compatibility, and buying considerations.

What Is the HPE 574758-B21?

The HPE 574758-B21 is an enterprise-class, hot-swappable SAS hard disk drive designed for high-performance server storage arrays. It combines a 15,000 RPM spindle speed with a 6Gbps SAS interface and dual-port architecture, making it ideal for mission-critical applications where uptime, redundancy, and fast data access are non-negotiable.

This part number is an HPE option part number, and the drive is also cross-referenced under several related identifiers, including:

• Spare Part Number: 575056-001
• Assembly Numbers: 516810-003 / 533871-003 / 574034-003
• Model Numbers: EF0600FARNA / EF0600FATFF

Because HPE frequently reuses drive mechanisms across multiple part numbers, you may see this same physical drive listed under other closely related SKUs such as 516830-B21 or 516828-B21. Functionally, they serve the same purpose in ProLiant storage bays.

Key Identifiers at a Glance

Technical Specifications

Understanding the full spec sheet helps IT administrators confirm this drive meets the performance and physical requirements of their server chassis before purchase.

Storage Capacity and Performance

The drive offers 600GB of usable capacity, positioned for enterprise environments that prioritize speed and reliability over raw storage density. At <cite index="2-1">15000 RPM spindle speed with a drive transfer rate of 600 MBps external</cite>, it delivers significantly faster random and sequential read/write performance compared to standard 7,200 RPM nearline drives — making it well-suited for transactional databases, virtualization hosts, and I/O-intensive applications.

Interface and Connectivity

The drive uses a <cite index="2-1">SAS 6Gb/s interface with dual-port capability</cite>, which allows the drive to maintain a connection through two independent data paths. This dual-port design is critical in enterprise storage arrays because it enables:

• Redundant connectivity to two separate storage controllers
• Continued data access if one path fails
• Load balancing across multiple I/O channels in clustered environments

Physical Form Factor

This is a <cite index="2-1">3.5-inch Large Form Factor (LFF) drive</cite>, designed to fit into standard LFF drive bays found in ProLiant tower and rack servers. Physical dimensions are approximately <cite index="2-1">7.00 inches in width, 9.00 inches in depth, and 4.63 inches in height</cite> when including the drive carrier/tray assembly.

Carrier and Hot-Swap Design

The drive ships <cite index="2-1">bundled with an HPE Standard Carrier</cite>, and certain variants are available in a Quick Release tray configuration. This carrier design supports hot-swap functionality, allowing administrators to replace a failed drive without powering down the host server — a critical feature for maintaining uptime in production environments.

Server Compatibility

One of the biggest advantages of the HPE 574758-B21 is its broad compatibility across multiple ProLiant server generations, making it a practical choice for organizations managing a mixed fleet of legacy and mid-generation hardware.

Supported ProLiant Generations

This drive is rated for use across ProLiant Generation 2 through Generation 7 servers, spanning a wide range of tower, rack, and scalable (SL series) server platforms. Confirmed compatible models include <cite index="2-1">the ProLiant SL160z Gen6, SL170s Gen6, SL170z Gen6, SL2x170z Gen6, SL165s Gen7, SL165z Gen7, SL335s Gen7, and SL390s Gen7</cite> server lines, among many other DL and ML series systems from the same hardware generations.

Why Cross-Generation Compatibility Matters

Data centers rarely refresh every server simultaneously. IT teams often manage overlapping hardware generations for years, and sourcing a single drive SKU that works reliably across Gen2–Gen7 ProLiant systems simplifies:

• Spare parts inventory management
• Break-fix and RMA processes
• Standardization of storage arrays across mixed server fleets
• Long-term support for legacy applications still running on older hardware

Confirming Compatibility Before Purchase

Because HPE server backplanes and drive controllers vary by model and firmware revision, it's recommended to verify compatibility against your specific server's QuickSpecs or contact the seller/reseller with your exact server model and generation before ordering, especially for edge-case configurations or blade-based systems.

Why Choose 15K RPM SAS Drives for Enterprise Workloads

Solid-state drives have taken over many performance-tier use cases, but 15K RPM SAS drives like the 574758-B21 still hold a relevant place in enterprise infrastructure.

Performance Advantages Over 7.2K SAS/SATA Drives

At 15,000 RPM, this drive spins over twice as fast as standard nearline SAS or SATA drives, translating into lower latency and higher IOPS for random-access workloads. This makes it a strong fit for:

• Database transaction logs
• Virtual machine datastores
• Email and messaging servers
• Applications requiring consistent low-latency disk access

Cost-Effective Alternative to SSD Upgrades

For organizations maintaining legacy ProLiant Gen2–Gen7 servers, a full migration to SSD or NVMe storage often isn't cost-justified, particularly for hardware nearing end-of-life or used in secondary/backup roles. A 15K SAS drive offers a meaningful performance boost over standard HDDs at a fraction of the cost of enterprise SSDs, extending the useful life of existing server investments.

Reliability in RAID Configurations

Enterprise SAS drives, including the 574758-B21, are engineered for continuous 24/7 operation and are commonly deployed in RAID 1, RAID 5, RAID 6, and RAID 10 arrays. Their dual-port SAS interface supports the redundant multipathing architecture required by enterprise RAID controllers and SAN environments.

Common Use Cases

Server Storage Refresh and Break-Fix Replacements

The most common application for this drive is replacing a failed or aging hard drive in an existing ProLiant server storage array, restoring the system to full RAID redundancy without requiring a broader hardware upgrade.

Expanding Storage Capacity in Existing Arrays

IT teams managing storage-bound applications can add additional 574758-B21 drives to existing disk arrays to expand available capacity while maintaining consistent drive performance characteristics across the array — an important consideration since mixing drive speeds in a single RAID group can create performance bottlenecks.

Lab, Test, and Development Environments

Because Gen2–Gen7 ProLiant servers are widely available on the secondary market at low cost, many organizations repurpose them for lab, staging, or development environments. The 574758-B21 provides a reliable, enterprise-grade storage option for these non-production but still performance-sensitive use cases.

Buying Considerations

New vs. Refurbished Drives

The 574758-B21 is commonly available in both new and refurbished condition through third-party HPE parts resellers. Refurbished units typically carry 90-day to 1-year warranties depending on the seller, while new/sealed units may carry longer warranty terms. For production environments, prioritize sellers offering documented testing procedures and clear warranty terms.

Verifying the Correct Part Number

Given the number of cross-referenced part numbers associated with this physical drive (575056-001, 516810-003, 574034-003, and others), confirm with your supplier that the exact carrier type (Standard vs. Quick Release) and firmware revision match your server's requirements before completing a purchase.

Warranty and Support

Reputable resellers of HPE server parts typically offer warranty coverage ranging from 90 days to 1 year on this drive. Given that this is a mechanical, moving-parts component operating at high RPM, warranty coverage is an important factor to weigh, particularly for production-critical deployments.

Frequently Asked Questions

Is the HPE 574758-B21 hot-swappable?

Yes. The drive ships in a carrier designed for hot-swap bays, allowing replacement without shutting down the host server, provided the server and RAID controller support hot-swap operations.

What is the difference between the 574758-B21 and 575056-001?

575056-001 is the HPE spare part number for the same physical drive; 574758-B21 is the option part number. They refer to the same underlying hardware.

Can this drive be used in a RAID array with SSDs?

It's not recommended to mix HDDs and SSDs within the same RAID group, as the mechanical drive's latency and IOPS ceiling will bottleneck the array's overall performance. This drive should be paired with other 15K SAS HDDs for consistent RAID performance.

Does this drive work in Gen8 or newer ProLiant servers?

No. This drive is rated specifically for Generation 2 through Generation 7 ProLiant servers. Newer server generations typically require different drive SKUs designed for their updated backplane and controller architecture.

Final Thoughts

The HPE 574758-B21 remains a dependable, enterprise-grade storage solution for organizations maintaining ProLiant Generation 2 through Generation 7 servers. Its combination of 15K RPM performance, dual-port SAS 6Gbps connectivity, and broad server compatibility make it a practical choice for break-fix replacements, storage expansion, and extending the operational life of existing server hardware — all without the cost and complexity of a full storage architecture overhaul.

For teams managing legacy or mixed-generation ProLiant fleets, standardizing on a proven, well-documented drive like the 574758-B21 simplifies procurement, maintenance, and long-term storage planning.