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SATA midline drive suited our capacity expansion needs.
872491-B21
4TB SATA 6G 7.2K LFF SC DS HDD PRICING PL-SI
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Name:
872491-B21
- Description:
- 4TB SATA 6G 7.2K LFF SC DS HDD PRICING PL-SI
- Rating:
Added to cart 28 times recently
- Availability:
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- Brand:
- Hpe
- Condition:
- Warranty:
- 3
- List Price:
$738.00
- Price:
$242.0067.2% off
Quantity:
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
- Weight
- 2.2 lbs
- Form Factor
- 3.5-inch
- Product Type
- Hard Drive
- Drive Type
- HDD
- Interface
- SATA III
- Storage Capacity
- 4 TB
- Spindle Speed (RPM)
- 7200 RPM
- Average Latency
- N/A
- Data Transfer Rate
- Up to 210 MB/s
- Annual Workload Rating
- 180 TB/yr
- Power Consumption (Read/Write)
- 8 Watts
- Helium Sealed
- Helium-Sealed
- Drive Bays Supported
- Multi-bay
- Vibration Protection
- Yes
- Height
- 1.03 inches
- Cache (Buffer Size)
- 256 MB
- Advanced Features
- Dual Actuator
- Operating Temperature
- 5–60°C
- Width
- 5.79 inches
- Use Case
- Desktop / Server / NAS / Surveillance
- Depth
- 4.01 inches
- Power Consumption (Idle)
- 4 Watts
- Encryption Support
- SED
- Product Name
- 872491-B21 Enterprise HDD
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.
What warranty and service options are included?
The 872491-B21 includes a standard three-year HPE limited warranty with optional Care Pack support for on-site repair and global coverage.
How much power does the 4TB SATA 6G 7.2K LFF HDD consume?
Typical power consumption is 8.4 W during read/write operations and 6.5 W at idle for efficient data center operation.
What are the physical dimensions of this HDD?
The drive measures 147 mm × 101.6 mm × 26.1 mm (L×W×H) and weighs approximately 0.65 kg.
Can I use this HDD in RAID configurations?
Yes, the drive supports hardware RAID levels 0, 1, 5, 6, 10, 50, and 60 when paired with a compatible RAID controller.
What is the average latency of the 7.2K 4TB HDD?
With a 7,200 RPM spindle, the average rotational latency is 4.16 ms, ensuring responsive access to stored data.
What is the current pricing for SKU 872491-B21?
Pricing varies by volume and region; please contact your HPE reseller or check the official HPE storefront for up-to-date quotes.
How do I install the 4TB SATA 6G 7.2K LFF HDD?
Slide the drive into an empty 3.5" hot-plug bay until the tray latches, then verify detection in your server’s BIOS or RAID utility.
Is the price listed per unit or discounted for bulk orders?
List pricing applies per unit; volume discounts are available—contact an HPE authorized reseller for tiered pricing.
Where can I purchase the 872491-B21 4TB SATA HDD?
You can buy directly from HPE’s online store, authorized channel partners, or major enterprise IT resellers.
Does this LFF HDD support high-temperature operation?
Yes, the drive operates reliably between 5 °C and 55 °C, suitable for standard data center conditions.
What level of shock and vibration resistance does this drive offer?
It meets enterprise-class durability standards: 50 G shock (operating) and 5 G vibration (5–500 Hz operating).
What customer support is available for this HDD?
HPE provides 24×7 global phone support, online diagnostics, firmware updates, and optional on-site maintenance through Care Packs.