United States$5,000,000+
Inventory Delivered By
N
Nathan Brooks
4
High-capacity SAS RI SSD with steady performance.
816576-B21
HP 3.84TB 12G SAS READ INTENSIVE-3 SFF 2.5-IN 816576-B21
FEATURED DEAL
Name:
816576-B21
- Description:
- HP 3.84TB 12G SAS READ INTENSIVE-3 SFF 2.5-IN 816576-B21
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Hpe
- Condition:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Shipping:
Payment:
3 Year Extended Warranty
Same-day Shipping
14-Day Money Back Guarantee
Need Additional Discount on Product?
Request a quote below - Get Exclusive Pricing and Support.
Shipping:
Payment:
TRUSTED, TRIED, PROVEN
Officially Accredited
& Verified By
Next-Gen IT
Solutions Powered By
816576-B21 Overview
816576-B21 is a high-performance HDD engineered for enterprise storage solutions. This drive features a 3.5-inch form factor with a SATA III interface and a robust 7200 RPM spindle speed, delivering a storage capacity of 4 TB and a generous 256 MB cache. It is designed to support intensive workloads with an annual workload rating of 550 TB/yr and an MTBF of 1,000,000 hours, ensuring reliable operations rated for continuous use.
Optimized for data centers, servers, and NAS environments, 816576-B21 offers advanced features such as a helium-sealed design, integrated vibration protection, and Dual Actuator technology. Its power efficiency—averaging 7 W during read/write operations and 5 W when idle—combined with AES 256-bit encryption support makes it a versatile solution for high-demand storage applications.
816576-B21 price is is available on request. Get immediate quote.
Request bulk order quote for 816576-B21 for additional pricing. Browse the full Hpe Server 2.5" Hard Drives series or explore all Hpe products.
816576-B21 Specifications
- Product Type
- Hard Drive
- Drive Type
- HDD
- Use Case
- Enterprise Storage
- 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)
- 7 W
- Power Consumption (Idle)
- 5 W
- 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
- 816576-B21 Enterprise Helium-Sealed HDD
- Height
- 1.03 inches
- Width
- 4.00 inches
- Depth
- 5.79 inches
- Weight
- 1.2 lbs
816576-B21 Use Case
Enterprise Analytics Acceleration with High-Throughput 12G SAS SSD
Deploy the 816576-B21 HP 3.84TB 12G SAS Read Intensive-3 SSD as a read-cache tier in data warehousing and BI platforms (e.g., SAP HANA, Oracle Exadata). By delivering sustained 12G SAS bandwidth and up to 200K read IOPS, it slashes query latency by over 50%, enabling sub-second report generation, real-time dashboards and faster insights for data-driven decision-making.
VDI Boot-Storm Mitigation for Large-Scale Desktop Virtualization
Integrate the 816576-B21 HP 3.84TB Read Intensive-3 SSD into VMware Horizon or Citrix environments to absorb simultaneous boot or login events. Its 3.84TB capacity and high read IOPS handle thousands of VM start-ups in parallel, reducing boot-storm delays by up to 70% and ensuring seamless end-user productivity during peak access periods.
Accelerated Web and CDN Caching for E-Commerce Platforms
Use the 816576-B21 HP 12G SAS SSD as a front-end cache in web servers or CDN edge nodes to serve static content, product images and videos. With low latency (<1ms) and high sustained throughput, it improves page load times by 40%, enhances customer experience, boosts SEO rankings and increases conversion rates during traffic surges.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 816576-B21 |  P04523-B21 |  Q6L99A |  804625-B21 |  P04519-B21 | |
|---|---|---|---|---|---|
| Product Type | Hard Drive | Hard Drive | Hard Drive | Hard Drive | Hard Drive |
| Drive Type | HDD | HDD | HDD | HDD | HDD |
| Use Case | Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Enterprise Storage | Enterprise Storage | Server |
| Interface | SATA III | SATA III | SAS 12Gb/s | SAS 12Gb/s | SATA III |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Storage Capacity | 4 TB | 4 TB | 12 TB | 4 TB | 4 TB |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache (Buffer Size) | 256 MB | 128 MB | 512 MB | 256 MB | 64 MB |
| Average Latency | N/A | N/A | N/A | N/A | N/A |
| Data Transfer Rate | Up to 250 MB/s | Up to 250 MB/s | Up to 300 MB/s | Up to 250 MB/s | Up to 150 MB/s |
| Annual Workload Rating | 550 TB/yr | 300 TB/yr | 550 TB/yr | 550 TB/yr | 180 TB/yr |
| Power Consumption (Read/Write) | 7 W | 8.5 Watts | 8 Watts | 7.2 Watts | 8 Watts |
| Power Consumption (Idle) | 5 W | 6.5 Watts | 4 Watts | 4.5 Watts | 6 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 | Single |
| 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 | 5–55°C |
| Product Name | 816576-B21 Enterprise Helium-Sealed HDD | P04523-B21 4TB Enterprise HDD | Q6L99A Enterprise HDD | 804625-B21 Enterprise HDD | P04519-B21 4TB Enterprise SATA HDD |
| Height | 1.03 inches | 1.03 inches | 1.0 inches | 1.03 inches | 1.03 inches |
| Width | 4.00 inches | 4.00 inches | 5.8 inches | 5.79 inches | 5.78 inches |
| Depth | 5.79 inches | 5.79 inches | 4.0 inches | 4.00 inches | 4.00 inches |
| Weight | 1.2 lbs | 1.6 lbs | 1.8 lbs | 2.2 lbs | 1.6 lbs |
Reviews & Ratings
F
Farah Khan
5
Smooth integration and reliable reads.
I
Ivo Petrov
5
Consistent throughput for enterprise workloads.
B
Bilal Junaid
4
No issues during peak usage.
S
Stuart Miles
5
Meets expectations for RI SAS SSDs.
Questions & Answers
What is the HP 3.84TB 12G SAS Read Intensive-3 SFF 2.5" (SKU: 816576-B21)?
The HP 3.84TB 12G SAS Read Intensive-3 SFF 2.5" (SKU: 816576-B21) is an enterprise-grade solid state drive designed for read-intensive workloads, offering 3.84 TB capacity, 12 Gb/s SAS interface, and a 2.5" small form factor.
What performance can I expect from this 12G SAS SSD?
This drive delivers up to 1,500 MB/s sequential read and write throughput with up to 300,000 IOPS, ensuring low latency and high data access speeds for read-heavy applications.
What does 'Read Intensive-3' mean?
‘Read Intensive-3’ indicates the drive is optimized for workloads with a read-to-write ratio of 95:5, supporting up to 3 full drive writes per day (DWPD) over its warranty period.
Which servers is SKU 816576-B21 compatible with?
This SSD is fully compatible with HP ProLiant Gen9 and Gen10 servers, as well as any storage array or server platform that supports 12 Gb/s SAS and 2.5" drives.
Is the drive hot-swappable?
Yes, the drive supports hot-swap capability in HP server bays, allowing maintenance or upgrades without powering down the system.
What form factor does the HP 816576-B21 use?
The HP 816576-B21 uses a 2.5" small form factor (SFF), ideal for high-density server and storage enclosures.
How reliable is this SSD?
With an MTBF of 2 million hours and enterprise-grade NAND, the drive offers high reliability for continuous operation in data center environments.
What power consumption should I plan for?
Typical active power consumption is 8 W, while idle power is around 3 W, optimizing energy efficiency in rack-mounted systems.
Does the drive support data protection features?
Yes, it includes power-loss data protection, end-to-end data path protection, and advanced ECC to safeguard data integrity.
How do I install the HP 3.84TB 12G SAS SSD?
Slide the drive into an available 2.5" SAS bay in your HP server or RAID enclosure, secure the carrier latch, and configure via your server’s storage controller utility.
What warranty does this SSD include?
The HP 816576-B21 comes with a standard three-year limited warranty and optional HP Care Pack services for extended coverage.
Can I use this SSD for virtualization and database workloads?
Yes, its high IOPS and low latency make it ideal for virtualization, database acceleration, boot volumes, and read-heavy analytics.
How does the 12G SAS interface benefit performance?
The 12 Gb/s SAS interface doubles the bandwidth of 6 Gb/s SAS, reducing bottlenecks and improving throughput for demanding enterprise applications.
What operating temperature range is supported?
This drive operates reliably between 0 °C and 60 °C, suitable for standard data center cooling environments.
Is this SSD compatible with RAID configurations?
Yes, it supports hardware RAID levels when used with compatible HP Smart Array controllers, enhancing data protection and performance.
Where can I purchase part number 816576-B21?
You can order HP 3.84TB 12G SAS Read Intensive-3 SFF 2.5" (816576-B21) through authorized HP resellers, the HP Store, or certified distributors.
How does this Read Intensive-3 SSD differ from Data Center or Mixed-Use SSDs?
Read Intensive-3 SSDs are optimized for high read workloads with lower write endurance (3 DWPD), while Mixed-Use and Data Center models support higher write endurance at increased cost.