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High capacity helium drive reduced rack density needs.
857644-B21
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HPE 10TB SAS 12G Midline 7.2K LFF (3.5in) SC 1yr Wty Helium...
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Name:
857644-B21
- Description:
- HPE 10TB SAS 12G Midline 7.2K LFF (3.5in) SC 1yr Wty Helium 512e Digitally Signed Firmware HDD For Use with Gen8/Gen9 or Newer
- Rating:
Added to cart 28 times recently
- Availability:
In stock - Ready to Ship
- Brand:
- Hpe
- Condition:
- Warranty:
- 3
- List Price:
$1,947.00
- Price:
$477.0075.5% off
Quantity:
1
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857644-B21 Overview
857644-B21 is a high-performance HDD housed in a 3.5-inch form factor with a SATA III interface and a spindle speed of 7200 RPM, offering a 4 TB storage capacity paired with a 256 MB cache. It is engineered for demanding environments with an annual workload rating of 550 TB/yr and an MTBF of 2,000,000 hours, ensuring exceptional reliability and rated for continuous operation in both desktop and server applications.
Designed for diverse use cases including data centers, desktops, NAS, and surveillance systems, 857644-B21 features advanced technologies such as helium-sealed construction, built-in vibration protection, and dual actuator functionality. It also delivers efficient power consumption with 8 W during read/write operations and 5 W when idle, making it an ideal choice for high-performance enterprise storage solutions.
857644-B21 price is $477.00, a 75.5% saving from the Hpe list price of $1,947.00. 857644-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 857644-B21 for additional pricing. Browse the full Hpe Server 3.5" Hard Drives series or explore all Hpe products.
857644-B21 Specifications
- Product Type
- Hard Drive
- Drive Type
- HDD
- Use Case
- Desktop / Server / NAS / Surveillance / 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 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
- 5–60°C
- Product Name
- 857644-B21
- Height
- 1.03 inches
- Width
- 4.00 inches
- Depth
- 5.78 inches
- Weight
- 1.20 lbs
857644-B21 Use Case
Enterprise Backup & Archival with 10TB SAS Helium HDD
In a multinational financial services firm running HPE Gen9 servers, the 857644-B21 10TB SAS 12G Midline Helium HDD delivers high-density, cost-effective cold storage for nightly full-image backups and multi-year archival data. Digitally signed firmware ensures enterprise-grade data integrity, while 512e sector optimization and 7.2K RPM performance reduce TCO by 30% compared to legacy SATA arrays, guaranteeing fast restores and compliance-ready retention for audit-critical records.
24x7 Video Surveillance Retention on HPE ProLiant
A global retail chain deploys the 857644-B21 10TB SAS Midline Helium drive in HPE Gen8 rack servers to store 4K CCTV streams from 2,000+ stores. The drive’s helium fill and 7.2K RPM deliver whisper-quiet operation and 35% lower power consumption, while SAS 12G bandwidth and digitally signed firmware ensure continuous, reliable write performance for up to 180 days of high-resolution footage, enhancing store security and simplifying forensic retrieval.
Big Data Analytics Repository for Hybrid Cloud
An IoT analytics provider uses HPE Gen9 infrastructure populated with 857644-B21 10TB SAS HDDs as the primary storage layer for Hadoop HDFS and Spark clusters. The 512e sector format and robust SAS 12G interface deliver sustained throughput of 220 MB/s per drive, enabling rapid ingestion of sensor streams and real-time data queries. This scalable, helium-cooled solution lowers rack-space requirements by 40% and accelerates time-to-insight for data-driven product innovation.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 857644-B21 |  Q2P86A |  801882-B21 |  804634-B21 |  804628-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 / Enterprise Storage | Desktop / Server / NAS | 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 | 4 TB | 12 TB | 8 TB | 8 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 | N/A | 4.17 ms | N/A | N/A |
| Data Transfer Rate | Up to 250 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 | 180 TB/yr | 550 TB/yr | 300 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8 W | 8 Watts | 9 Watts | 8.0 Watts | 8 Watts |
| Power Consumption (Idle) | 5 W | 6 Watts | 7 Watts | 4.0 Watts | 4 Watts |
| Encryption Support | AES 256-bit | No | 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 | 5–55°C | 5–60°C | 5–60°C | 5–60°C |
| Product Name | 857644-B21 | Q2P86A High-Performance Enterprise HDD | 801882-B21 Enterprise Helium-Sealed HDD | 804634-B21 Enterprise HDD | 804628-B21 |
| Height | 1.03 inches | 1.04 inches | 1.03 inches | 1.03 inches | 1.03 inches |
| Width | 4.00 inches | 4 inches | 4.00 inches | 4.01 inches | 4.00 inches |
| Depth | 5.78 inches | 5.79 inches | 5.79 inches | 5.79 inches | 5.80 inches |
| Weight | 1.20 lbs | 3.3 lbs | 1.80 lbs | 1.7 lbs | 1.16 lbs |
Reviews & Ratings
S
Shayan Malik
5
Quiet operation with stable throughput.
V
Victor Chen
5
Good choice for large data sets.
A
Adnan Tariq
4
Reliable long term storage.
K
Klaus Richter
4
Excellent capacity upgrade.
Questions & Answers
What is the capacity and form factor of the HPE 857644-B21 hard drive?
The HPE 857644-B21 is a 10 TB, 3.5-inch large form factor (LFF) SAS 12 Gb/s midline HDD designed for HPE servers.
Which HPE server generations are compatible with the 857644-B21 drive?
This drive is fully compatible with HPE ProLiant Gen8, Gen9 or any newer HPE server platforms that support SAS 12 Gb/s HDDs.
What interface and rotational speed does the HPE 857644-B21 use?
The drive features a dual-port SAS 12 Gb/s interface and spins at 7,200 RPM to balance performance and capacity.
What benefits does the helium-filled design deliver?
Helium filling reduces internal turbulence by up to 80 %, lowering power consumption, operating temperatures and improving drive reliability.