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PCIe accelerator delivers consistent read performance.
831735-B21
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HP 1.6TB READ INTENSIVE-2 HH/HL PCIE WORKLOAD ACCELERATOR
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831735-B21
- Description:
- HP 1.6TB READ INTENSIVE-2 HH/HL PCIE WORKLOAD ACCELERATOR
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831735-B21 Overview
831735-B21 is a high-performance HDD engineered with a 3.5-inch form factor and a SATA III interface, delivering a 7200 RPM spindle speed and a robust storage capacity of 4 TB. It features a substantial 256 MB cache, a 550 TB/yr annual workload rating, and an MTBF of 1,000,000 hours with a reliability rating of 1,200 hours/year, ensuring dependable performance for demanding enterprise applications.
831735-B21 is optimized for enterprise storage environments including data centers, high-performance desktops, NAS, and surveillance systems. It offers efficient power consumption with 8.0 Watts during read/write operations and 4.0 Watts when idle, and comes equipped with advanced features such as a helium-sealed design, dedicated vibration protection, and dual actuator technology for enhanced drive stability.
831735-B21 price is is available on request. Get immediate quote.
Request bulk order quote for 831735-B21 for additional pricing. Browse the full Hpe Server 2.5" Hard Drives series or explore all Hpe products.
831735-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)
- 8.0 Watts
- Power Consumption (Idle)
- 4.0 Watts
- Encryption Support
- AES 256-bit
- Helium Sealed
- Helium-Sealed
- Drive Bays Supported
- Multi-bay
- Vibration Protection
- Yes
- Advanced Features
- Dual Actuator
- Operating Temperature
- 5–60°C
- Product Name
- 831735-B21 HDD Enterprise Drive
- Height
- 1.05 inches
- Width
- 5.8 inches
- Depth
- 4.0 inches
- Weight
- 3.5 lbs
831735-B21 Use Case
Real-Time Data Warehouse Acceleration with 831735-B21-HP 1.6TB READ INTENSIVE-2
In a global online retailer’s data warehouse environment, the HP 1.6TB READ INTENSIVE-2 HH/HL PCIe Workload Accelerator (831735-B21) reduces aggregate query latency by up to 70% on read-heavy analytics. By offloading high-volume SELECT operations to the PCIe accelerator, data scientists achieve sub-second BI report generation and ad hoc analytics at scale. Benefit: delivers consistent real-time insights, maximizes user satisfaction, and lowers infrastructure TCO through higher read throughput and reduced compute overhead.
Enterprise Virtual Desktop Infrastructure (VDI) Boot-Storm Mitigation
In a financial services firm supporting 5,000 virtual desktops, the 831735-B21 HP 1.6TB READ INTENSIVE-2 accelerator tackles boot-storm and login-storm events by serving concurrent read requests at 2 GB/s. Integrated into hypervisor hosts, it shortens boot times by 60% and accelerates application streaming, ensuring bankers access trading platforms instantly during peak hours. Benefit: enhances end-user productivity, stabilizes performance under heavy load, and reduces help-desk tickets with predictable, low-latency desktop operations.
High-Velocity Big Data Analytics & Caching
In a telecom carrier’s Hadoop/Spark cluster, deploying the HP 1.6TB READ INTENSIVE-2 accelerator (831735-B21) on edge-compute nodes accelerates map-reduce and in-memory query workloads by up to 3×. The PCIe-based NVMe device offloads read-intensive hot data sets, enabling rapid ad hoc analysis and real-time network performance monitoring. Benefit: empowers data engineers to deliver time-sensitive insights, reduces SLA risk, and optimizes cluster ROI by cutting node count and power draw while maintaining peak read performance.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 831735-B21 |  P09096-B21 |  653957-001 |  785069-B21 |  873359-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 | Desktop / Server / NAS / Surveillance / 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 | SATA III |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Storage Capacity | 4 TB | 8 TB | 8 TB | 4 TB | 10 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 | 256 MB |
| Average Latency | N/A | N/A | N/A | 4.16 ms | N/A |
| Data Transfer Rate | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s |
| Annual Workload Rating | 550 TB/yr | 550 TB/yr | 300 TB/yr | 180 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8.0 Watts | 12 W | 8 Watts | 8.5 Watts | 7.5 Watts |
| Power Consumption (Idle) | 4.0 Watts | 7 W | 5 Watts | 5.0 Watts | 5 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 | Rotational Vibration Sensors | Dual Actuator |
| Operating Temperature | 5–60°C | 5–60°C | 5–60°C | 5–55°C | 5–60°C |
| Product Name | 831735-B21 HDD Enterprise Drive | P09096-B21 Enterprise Performance HDD | 653957-001 Enterprise HDD | 785069-B21 Enterprise Helium Sealed HDD | 873359-B21 High-Performance HDD |
| Height | 1.05 inches | 1.03 inches | 1.0 inches | 1.03 inches | 1.03 inches |
| Width | 5.8 inches | 4.01 inches | 4.0 inches | 4.00 inches | 5.78 inches |
| Depth | 4.0 inches | 5.78 inches | 5.8 inches | 5.79 inches | 4.02 inches |
| Weight | 3.5 lbs | 1.65 lbs | 3.3 lbs | 1.8 lbs | 3.53 lbs |
Reviews & Ratings
A
Aiman Noor
5
Easy install and noticeable speed gains.
S
Sven Holm
5
Stable HH/HL card under load.
Y
Yasir Mahmood
4
Good fit for read-intensive workloads.
C
Colin Fraser
5
Reliable enterprise PCIe solution.
Questions & Answers
What is the capacity and endurance rating of the HP 1.6TB Read Intensive-2 HH/HL PCIe Workload Accelerator (SKU: 831735-B21)?
The accelerator provides 1.6 TB of usable NVMe capacity and is rated for 0.3 drive writes per day (DWPD) over a 5-year warranty period.
What interface and form factor does the 831735-B21 use?
It uses a PCIe Gen3 x4 NVMe interface in a half-height, half-length (HH/HL) add-in card form factor.
What are the maximum sequential read and write speeds?
The accelerator delivers up to 3 100 MB/s sequential read and 1 200 MB/s sequential write performance.
What random IOPS performance can customers expect?
You can expect up to 400 000 random read IOPS and 60 000 random write IOPS (4 KB block size) at sub-millisecond latency.