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Write-intensive SAS SSD handles sustained writes well.
802586-B21
HPE 800GB SAS 12G Write Intensive SFF (2.5in) SC 3yr Warrant...
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802586-B21
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- HPE 800GB SAS 12G Write Intensive SFF (2.5in) SC 3yr Warranty SSD For use with Gen8 Servers and Beyond
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802586-B21 Overview
802586-B21 is a high-performance HDD designed in a 3.5-inch form factor with a SATA III interface, spinning at 7200 RPM. It offers a 4 TB storage capacity with a 256 MB cache and is engineered for enterprise storage environments. This drive is built with advanced features such as helium-sealing, vibration protection, and dual actuator technology, ensuring robust reliability with an MTBF of 2,000,000 hours, and is rated for 24x7 operation.
802586-B21 is optimized for data centers, NAS systems, desktops, and surveillance applications. The drive delivers up to 210 MB/s data transfer rate and supports an annual workload rating of 550 TB/yr while consuming 8.5 Watts during read/write operations and 5 Watts in idle mode. Its design, including precise dimensions and weight, makes it ideal for multi-bay environments where endurance and performance are critical.
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802586-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 210 MB/s
- Annual Workload Rating
- 550 TB/yr
- Power Consumption (Read/Write)
- 8.5 Watts
- Power Consumption (Idle)
- 5 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
- 802586-B21 Enterprise HDD
- Height
- 1.03 inches
- Width
- 5.79 inches
- Depth
- 7.1 inches
- Weight
- 3.3 lbs
802586-B21 Use Case
High-Performance Virtual Desktop Infrastructure with 802586-B21-HPE 800GB SAS SSD
A global enterprise deploys 802586-B21-HPE 800GB SAS 12G Write Intensive SFF (2.5in) SC 3yr Warranty SSD in its HPE Gen8 server cluster to support 2,000 concurrent virtual desktops. The SSD delivers 40% higher IOPS and 30% lower latency compared to legacy HDD arrays, enabling sub-60-second login times and 99.9% SLA uptime. Benefit: Scalable VDI density, predictable performance under peak load, and a 3-year warranty-backed reduction in storage TCO.
Ultra-Low Latency OLTP Database Acceleration for Financial Services
A tier-1 brokerage firm integrates the 802586-B21-HPE 800GB SAS 12G Write Intensive SSD into HPE Gen8 servers running high-frequency trading and order-matching engines. The solution achieves sub-millisecond transaction commits and 80% faster end-of-day reconciliation. Benefit: Maximized trade throughput, stringent SLA compliance, and minimized market risk on a 3-year warranty platform.
Real-Time E-Commerce Analytics on HPE Gen8 Infrastructure
A leading online retailer uses 802586-B21-HPE 800GB SAS 12G Write Intensive SSD in its Gen8 server farm to power real-time query engines over 50K transactions per minute. The SSD improves query response by 60% and supports instant inventory updates during flash sales. Benefit: Accelerated decision-making, enhanced customer experience through zero-lag stock visibility, and long-term reliability under a 3-year warranty.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 802586-B21 |  736939-B21 |  Q2R41A |  872392-B21 |  765034-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 | 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 | 4 TB | 4 TB | 4 TB | 10 TB |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache (Buffer Size) | 256 MB | 128 MB | 256 MB | 256 MB | 256 MB |
| Average Latency | N/A | 8.5 ms | N/A | N/A | N/A |
| Data Transfer Rate | Up to 210 MB/s | Up to 210 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s |
| Annual Workload Rating | 550 TB/yr | 300 TB/yr | 550 TB/yr | 550 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8.5 Watts | 8.5 Watts | 9 Watts | 8 Watts | 8W |
| Power Consumption (Idle) | 5 Watts | 5 Watts | 5 Watts | 5 Watts | 6W |
| 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 | 5–60°C | 5–60°C | 5–60°C | 5–60°C | 5–60°C |
| Product Name | 802586-B21 Enterprise HDD | 736939-B21 | Q2R41A Enterprise HDD | 872392-B21 Enterprise HDD | 765034-B21 10TB Enterprise HDD |
| Height | 1.03 inches | 1.03 inches | 1.03 inches | 1.04 inches | 1 in |
| Width | 5.79 inches | 5.79 inches | 5.79 inches | 4.00 inches | 4 in |
| Depth | 7.1 inches | 4.00 inches | 7.13 inches | 5.79 inches | 5.8 in |
| Weight | 3.3 lbs | 1.75 lbs | 2.2 lbs | 2.2 lbs | 1.8 lbs |
Reviews & Ratings
K
Kiran Shah
5
Consistent write performance without throttling.
P
Petra Novak
5
Stable firmware and reliable endurance.
I
Imran Qureshi
5
Good choice for databases and logs.
V
Victor Haines
4
Enterprise WI SSD that performs reliably.
Questions & Answers
What is the HPE 800GB SAS 12G Write Intensive SFF (2.5in) SC SSD with SKU 802586-B21?
The HPE 800GB SAS 12G Write Intensive SFF (2.5in) SC SSD (SKU 802586-B21) is an enterprise-grade 800 GB drive with a 12 Gb/s SAS interface, write-intensive endurance, and 2.5″ form factor, optimized for HPE Gen8 and later servers.
What are the key features of the 802586-B21 SSD?
Key features include 800 GB capacity, 12 Gb/s SAS‐3 interface, write-intensive 10 DWPD endurance, up to 1.2 GB/s sequential read and 880 MB/s write, sub-200 µs latency, hot-swap support, and a 3-year HPE warranty.
Is the 800GB SAS 12G SSD compatible with HPE Gen8 servers and beyond?
Yes. It is fully compatible with HPE ProLiant Gen8 servers and any subsequent HPE platforms that support 12 Gb/s SAS and 2.5″ SFF drives.
What are the sequential and random performance specifications?
This SSD delivers up to 1.2 GB/s sequential read, 880 MB/s sequential write, up to 100,000 random read IOPS, and 60,000 random write IOPS over a 12 Gb/s SAS interface.
What is the endurance rating of the HPE 802586-B21 SSD?
Designed for write-intensive workloads, it offers 10 drive-writes-per-day (DWPD) over a 3-year warranty period, equating to approximately 8.76 PB total bytes written (TBW).
Which form factor and interface does this SSD use?
The drive uses a 2.5-inch small form factor (SFF) with a single-connector 12 Gb/s SAS interface, compatible with standard HPE drive sleds.
What warranty coverage is included with this SSD?
It comes with a standard 3-year HPE enterprise warranty, offering advanced replacement and 24×7 global support for hardware faults.
What workloads is this write-intensive SSD best suited for?
Ideal for high-transaction databases, virtualization, big data analytics, caching layers, and other write-intensive enterprise applications requiring consistent low latency.
How do I install the HPE 800GB SAS 12G SSD in my server?
Slide the SSD into any 2.5″ SAS bay on an HPE Gen8 or later server, secure it with the drive sled latch, then configure via your HPE Smart Array controller or firmware utility.
Can I mix this SSD with HDDs or other SSD types in a RAID array?
Yes, but for optimal performance, group drives by class. You can place write-intensive SSDs in one RAID set and HDDs or read-optimized SSDs in separate sets.
What is the typical latency of this SSD under load?
This drive achieves sub-200 µs average read latency and sub-300 µs average write latency, ensuring consistent low-latency performance under heavy workloads.
Does the 802586-B21 SSD support hot swapping?
Yes. When used with a hot-swap capable backplane and controller, you can remove or install the SSD without shutting down the server.
How does this SSD improve overall data center performance?
By reducing I/O bottlenecks, accelerating application response times, and lowering total cost of ownership through energy-efficient, high-throughput storage.
What is the power consumption of the HPE 800GB SAS 12G SSD?
The SSD consumes approximately 7 W during active operation and 3 W at idle, optimizing energy usage in dense server deployments.
Is this SSD certified for major virtualization platforms?
Yes. It is certified for VMware ESXi, Microsoft Hyper-V, and other leading hypervisors, ensuring seamless integration in virtualized environments.
Where can I purchase genuine HPE SKU 802586-B21 SSDs?
Purchase authentic units through authorized HPE resellers, HPE Direct or certified online distributors to guarantee genuine product quality and full warranty coverage.