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872491-B21
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4TB SATA 6G 7.2K LFF SC DS HDD PRICING PL-SI
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872491-B21
- Description:
- 4TB SATA 6G 7.2K LFF SC DS HDD PRICING PL-SI
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- Brand:
- Hpe
- Condition:
- Warranty:
- 3
- List Price:
$738.00
- Price:
$242.0067.2% off
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1
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872491-B21 Overview
872491-B21 is an HDD engineered in a 3.5-inch form factor with a SATA III interface, spinning at 7200 RPM to deliver 4 TB of storage capacity alongside a 256 MB cache. It is rated for heavy-duty operations with an annual workload of 180 TB/yr, an MTBF of 2,000,000 hours, and a reliability rating of 1,000,000 hours/year.
872491-B21 is built for desktop, server, NAS, and surveillance environments, featuring 8 Watts of read/write power consumption and 4 Watts in idle mode. The drive incorporates advanced features including a helium-sealed enclosure, vibration protection, and dual actuator technology, making it ideal for data centers, enterprise storage, desktop applications, and surveillance systems.
872491-B21 price is $242.00, a 67.2% saving from the Hpe list price of $738.00. 872491-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 872491-B21 for additional pricing. Browse the full Hpe Server 3.5" Hard Drives series or explore all Hpe products.
872491-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 210 MB/s
- Annual Workload Rating
- 180 TB/yr
- Power Consumption (Read/Write)
- 8 Watts
- Power Consumption (Idle)
- 4 Watts
- Encryption Support
- SED
- Helium Sealed
- Helium-Sealed
- Drive Bays Supported
- Multi-bay
- Vibration Protection
- Yes
- Advanced Features
- Dual Actuator
- Operating Temperature
- 5–60°C
- Product Name
- 872491-B21 Enterprise HDD
- Height
- 1.03 inches
- Width
- 5.79 inches
- Depth
- 4.01 inches
- Weight
- 2.2 lbs
872491-B21 Use Case
Scalable Virtualization Storage for High-Density VM Environments
In VMware ESXi and Microsoft Hyper-V clusters, the 872491-B21-4TB SATA 6G 7.2K LFF SC DS HDD, priced PL-SI, delivers dense storage capacity with consistent random I/O performance. Enterprises can expand VM datastores economically, ensuring low latency, high availability and predictable performance for mission-critical applications.
Cost-Effective Backup and Disaster Recovery Target
As a primary backup repository in data protection platforms and tape-less DR workflows, the 872491-B21-4TB SATA 6G 7.2K LFF SC DS HDD pricing PL-SI offers reliable sequential write speeds and enterprise-grade data integrity. Organizations achieve a 30% reduction in total cost of ownership while meeting stringent RTO/RPO objectives and secure long-term retention requirements.
High-Throughput Video Surveillance Archival
For 24/7 network video recorder (NVR) deployments, the 872491-B21-4TB SATA 6G 7.2K LFF SC DS HDD, priced PL-SI, supports sustained high-bandwidth streams from HD and 4K cameras. Its 4 TB capacity and 7,200 RPM performance ensure uninterrupted recording with minimal frame loss, optimizing storage density and guaranteeing forensic-grade video retention.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 872491-B21 |  861691-B21 |  881785-B21 |  N9Y12A |  857648-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 | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance | Desktop / Server / NAS / Surveillance / Enterprise Storage |
| Interface | SATA III | SATA III | SATA III | SATA III | SAS 12Gb/s |
| 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 | 10 TB | 4 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 | 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 210 MB/s |
| Annual Workload Rating | 180 TB/yr | 550 TB/yr | 550 TB/yr | 300 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8 Watts | 8 Watts | 8 Watts | 8 Watts | 8.5 Watts |
| Power Consumption (Idle) | 4 Watts | 5 Watts | 5 Watts | 5 Watts | 5.2 Watts |
| Encryption Support | SED | 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 | 5–55°C | 5–60°C |
| Product Name | 872491-B21 Enterprise HDD | 861691-B21 Enterprise HDD | 881785-B21 Enterprise HDD | N9Y12A High Performance Enterprise HDD | 857648-B21 Enterprise Series SAS Hard Drive |
| Height | 1.03 inches | 1.03 | 1.03 inches | 1.03 inches | 1.03 inches |
| Width | 5.79 inches | 5.79 | 5.8 inches | 4 inches | 5.79 inches |
| Depth | 4.01 inches | 4.0 | 7.2 inches | 5.79 inches | 4.01 inches |
| Weight | 2.2 lbs | 1.8 | 1.6 lbs | 2.0 lbs | 3.64 lbs |
Reviews & Ratings
S
Saad Haroon
4
Stable long running performance.
C
Carlos Mendes
5
Integrated well with existing storage.
F
Furqan Yasin
4
Reliable HDD.
J
Johan Nilsson
5
Good storage density.
Questions & Answers
What are the key specifications of the 872491-B21 4TB SATA 6G 7.2K LFF HDD?
The 872491-B21 delivers 4TB capacity, 6Gb/s SATA interface, 7,200 RPM spindle speed, large form factor (3.5"), and dual-stage (SC DS) ramp load technology.
Is the 4TB SATA 6G 7.2K LFF HDD compatible with my server?
Yes—this HDD is fully compatible with HPE ProLiant Gen8/Gen9/Gen10 servers and any storage array supporting standard 3.5" SATA 6Gb/s drives.
Does the 872491-B21 HDD support hot-swap installation?
Yes, the drive supports hot-swap insertion and removal in any SAS/SATA backplane designed for 3.5" enterprise drives.
What is the mean time between failures (MTBF) for this HDD?
This enterprise-class drive offers an MTBF of 1.6 million hours for industry-leading reliability.