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Write-intensive SATA SSD performs reliably under load.
804665-B21
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HPE 400GB SATA 6G Write Intensive SFF (2.5in) SC 3yr Warrant...
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804665-B21
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- HPE 400GB SATA 6G Write Intensive SFF (2.5in) SC 3yr Warranty SSD For Use with Gen8 Servers and Beyond
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804665-B21 Overview
804665-B21 is a high-performance HDD engineered for demanding enterprise applications, featuring a 3.5-inch form factor and a robust SATA III interface. It operates at 7200 RPM, offers a generous 4 TB storage capacity with a 256 MB cache, and is rated for an annual workload of 550 TB/yr, ensuring dependable reliability in environments where rated operational hours are critical.
The drive is optimized for a wide range of use cases including data centers, desktops, NAS, and surveillance systems. With advanced features such as helium-sealing, built-in vibration protection, and a dual actuator setup, 804665-B21 delivers efficient power consumption (9 Watts read/write and 7 Watts idle) while maintaining an operating temperature of 5–55°C, making it an ideal choice for high-demand, continuous-use scenarios.
804665-B21 price is is available on request. Get immediate quote.
Request bulk order quote for 804665-B21 for additional pricing. Browse the full Hpe Server 2.5" Hard Drives series or explore all Hpe products.
804665-B21 Specifications
- Product Type
- Hard Drive
- Drive Type
- HDD
- Use Case
- Desktop / Server / NAS / Surveillance
- Interface
- SATA III
- Form Factor
- 3.5-inch
- Storage Capacity
- 4 TB
- Spindle Speed (RPM)
- 7200 RPM
- Cache (Buffer Size)
- 256 MB
- Average Latency
- N/A
- Data Transfer Rate
- Up to 250 MB/s
- Annual Workload Rating
- 550 TB/yr
- Power Consumption (Read/Write)
- 9 Watts
- Power Consumption (Idle)
- 7 Watts
- Encryption Support
- AES 256-bit
- Helium Sealed
- Helium-Sealed
- Drive Bays Supported
- Multi-bay
- Vibration Protection
- Yes
- Advanced Features
- Dual Actuator
- Operating Temperature
- 5–55°C
- Product Name
- 804665-B21 Enterprise HDD
- Height
- 1.03 inches
- Width
- 5.79 inches
- Depth
- 4.01 inches
- Weight
- 1.4 lbs
804665-B21 Use Case
High-Velocity Transactional Databases in Retail Environments
Deploy the 804665-B21 HPE 400GB SATA 6G Write Intensive SFF (2.5in) SC 3yr Warranty SSD in Gen8 servers powering point-of-sale and inventory management databases. By leveraging sustained write IOPS of up to 27K and sub-millisecond latency, retail enterprises achieve real-time stock updates, accelerate checkout throughput by 45%, and maintain 99.99% transaction integrity—delivering seamless customer experiences during peak shopping periods.
Enterprise Virtual Desktop Infrastructure (VDI) Performance Boost
Integrate the 804665-B21 HPE 400GB SATA 6G Write Intensive SSD into Gen8-based hypervisor clusters supporting 1,000+ simultaneous virtual desktops. The high endurance (DWPD 3.65) and consistent write performance reduce boot-storm times by 60%, enable rapid profile loading, and cut VDI storage latency by 80 ms—resulting in a more responsive user environment, simplified IT management, and a 30% reduction in storage TCO.
Real-Time Log Aggregation and Analytics for DevOps Pipelines
Use the 804665-B21 HPE 400GB SATA 6G Write Intensive SSD in Gen8 server arrays dedicated to centralized log ingestion and analytics. Thanks to its write-optimized architecture and sustained 6 Gb/s throughput, DevOps teams process high-volume application logs in real time, accelerating root-cause analysis by 50%, improving anomaly detection, and ensuring compliance reporting meets sub-minute SLAs—boosting operational agility and reducing incident MTTR.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 804665-B21 |  846432-B21 |  804625-B21 |  P00896-B21 |  P04527-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 | Desktop / Server / NAS / Surveillance / Enterprise Storage | Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage |
| Interface | SATA III | SATA III | SAS 12Gb/s | SATA III | SATA III |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Storage Capacity | 4 TB | 6 TB | 4 TB | 4 TB | 4 TB |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache (Buffer Size) | 256 MB | 256 MB | 256 MB | 256 MB | 128 MB |
| Average Latency | N/A | N/A | N/A | N/A | 4.16 ms |
| Data Transfer Rate | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 210 MB/s | Up to 210 MB/s |
| Annual Workload Rating | 550 TB/yr | 550 TB/yr | 550 TB/yr | 550 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 9 Watts | 10 Watts | 7.2 Watts | 7.5 Watts | 8.0 Watts |
| Power Consumption (Idle) | 7 Watts | 5 Watts | 4.5 Watts | 4.5 Watts | 6.0 Watts |
| Encryption Support | AES 256-bit | 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 | 5–55°C | 5–55°C | 5–60°C | 5–60°C | 0–60°C |
| Product Name | 804665-B21 Enterprise HDD | 846432-B21 | 804625-B21 Enterprise HDD | P00896-B21 Enterprise HDD | P04527-B21 Enterprise Helium-Sealed 4TB HDD |
| Height | 1.03 inches | 1.03 inches | 1.03 inches | 1.03 inches | 1.00 inches |
| Width | 5.79 inches | 5.78 inches | 5.79 inches | 5.79 inches | 5.80 inches |
| Depth | 4.01 inches | 7.36 inches | 4.00 inches | 4.00 inches | 4.00 inches |
| Weight | 1.4 lbs | 2.1 lbs | 2.2 lbs | 2.50 lbs | 1.80 lbs |
Reviews & Ratings
M
Mina Paracha
4
Good endurance for write-heavy tasks.
T
Tommaso Ricci
5
Predictable performance and stable firmware.
S
Salman Qayyum
5
Easy deployment and consistent results.
B
Brian Keller
5
Solid WI SSD for enterprise servers.
Questions & Answers
What are the key features of the HPE 400GB SATA 6G Write Intensive SFF SSD (804665-B21)?
The HPE 400GB SATA 6G Write Intensive SFF SSD delivers 6 Gb/s SATA interface speeds, up to 535 MB/s sequential read, 450 MB/s sequential write, 10 DWPD endurance, and a 3-year warranty for Gen8 servers and beyond.
Which HPE servers are compatible with SKU 804665-B21?
The 804665-B21 SSD is compatible with HPE ProLiant Gen8, Gen9, Gen10 and later servers featuring 2.5-inch drive bays and SATA 6 Gb/s support.
What level of performance can I expect from this write-intensive SSD?
This SSD delivers up to 535 MB/s sequential read, 450 MB/s sequential write and up to 80 K random read/write IOPS for demanding write-intensive workloads.
What is the endurance rating of the HPE 400GB SATA 6G Write Intensive SSD?
With a 10 Drive Writes Per Day (DWPD) rating over a 3-year period, this SSD supports sustained write-intensive operations.