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Reliable SAS drive for Gen8 and Gen9 servers. Easy to deploy.
781518-B21
HPE 1.2TB SAS 12G Enterprise 10K SFF (2.5in) SC 3yr Warranty...
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781518-B21
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- HPE 1.2TB SAS 12G Enterprise 10K SFF (2.5in) SC 3yr Warranty HDD For Use With Gen8/Gen9 or Newer
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781518-B21 Overview
781518-B21 is a high-performance HDD designed for demanding enterprise storage applications. Built in a 3.5-inch form factor with a SATA III interface and a spindle speed of 7200 RPM, this drive boasts an 8 TB capacity and a 256 MB cache. It is engineered with advanced features such as a helium-sealed design, dual actuator technology, and robust vibration protection to ensure optimal performance and durability. The drive also offers a rated MTBF of 2,500,000 hours and is designed for 24/7 operation, making it ideal for data centers and server environments.
The 781518-B21 is optimized for intensive workloads with an impressive annual workload rating of 550 TB/yr, while maintaining efficient power consumption figures of 8 Watts during read/write operations and 5 Watts in idle mode. Its reliable design and enterprise-class components make it suitable for critical applications in data centers, desktops, NAS, and surveillance systems, ensuring dependable performance under continuous use.
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781518-B21 Specifications
- Product Type
- Hard Drive
- Drive Type
- HDD
- Use Case
- Enterprise Storage
- Interface
- SATA III
- Form Factor
- 3.5-inch
- Storage Capacity
- 8 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 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
- 781518-B21 Enterprise HDD
- Height
- 1.03 inches
- Width
- 5.79 inches
- Depth
- 4.00 inches
- Weight
- 2.1 lbs
781518-B21 Use Case
High-Transaction OLTP Database Acceleration with 781518-B21-HPE 1.2TB SAS 12G Enterprise 10K SFF
In a financial services environment running Microsoft SQL Server on HPE ProLiant Gen9, deploying multiple 781518-B21-HPE 1.2TB SAS 12G Enterprise 10K SFF drives in a RAID 10 array delivers sub-1 ms read/write latencies under heavy OLTP workloads. The result is 30% faster transaction processing, consistent 99.99% system availability, and reduced risk of I/O bottlenecks during peak trading hours.
Virtualized Mixed-Workload Optimization on Gen8/Gen9 with 781518-B21-HPE HDD
An enterprise IT department consolidates 50+ Windows and Linux VMs on an HPE ProLiant Gen8 cluster. Integrating 781518-B21-HPE 1.2TB SAS 12G 10K SFF drives into each server enhances sustained IOPS performance by 25%, cuts VM boot storms by half, and ensures predictable latency for business-critical applications—all backed by a 3-year HPE warranty for uninterrupted operations.
Secure On-Premises Backup and Archive Storage with 781518-B21-HPE 1.2TB SAS
A healthcare provider implements a tiered backup solution on HPE Gen9 servers using 781518-B21-HPE 1.2TB SAS 12G Enterprise drives in RAID 6. This configuration stores patient records with 99.999% data integrity and 6-hour restore SLAs. The combination of high-density 2.5″ form factor and enterprise-grade reliability meets strict HIPAA compliance and reduces total cost of ownership by 20% over tape-based systems.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 781518-B21 |  P06200-B21 |  Q2T63A |  Q6M07A |  P09096-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 / SAS 12Gb/s |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Storage Capacity | 8 TB | 4 TB | 10 TB | 10 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 | N/A | 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 | 550 TB/yr | 550 TB/yr | 550 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8 Watts | 8 Watts | 8.5 Watts | 8 Watts | 12 W |
| Power Consumption (Idle) | 5 Watts | 5 Watts | 6.0 Watts | 6 Watts | 7 W |
| 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 | 5–55°C | 5–60°C | 5–60°C |
| Product Name | 781518-B21 Enterprise HDD | P06200-B21 Enterprise HDD | Q2T63A 10TB Enterprise HDD | Q6M07A Enterprise HDD | P09096-B21 Enterprise Performance HDD |
| Height | 1.03 inches | 1.03 inches | 1.03 inches | 1.03 inches | 1.03 inches |
| Width | 5.79 inches | 4 inches | 5.79 inches | 5.79 inches | 4.01 inches |
| Depth | 4.00 inches | 5.8 inches | 4.00 inches | 4.00 inches | 5.78 inches |
| Weight | 2.1 lbs | 1.5 lbs | 2.2 lbs | 3.5 lbs | 1.65 lbs |
Reviews & Ratings
R
Rizwan Haider
5
Consistent performance and smooth RAID configuration.
P
Paola Conti
5
Stable under continuous workloads. No compatibility issues.
I
Imtiaz Ahmad
5
Good enterprise drive with predictable behavior.
G
George Phillips
5
Works as expected. Solid performance for business use.
Questions & Answers
What are the main specifications of the HPE 1.2TB SAS 12G Enterprise 10K SFF HDD (SKU: 781518-B21)?
The HPE 781518-B21 features 1.2 TB capacity, 10 000 RPM speed, 12 Gb/s SAS interface, 2.5-inch SFF form factor with Smart Carrier (SC), and includes a 3-year limited hardware warranty.
Is this HDD compatible with HPE ProLiant Gen8, Gen9, or newer servers?
Yes. The 1.2 TB SAS 12G Enterprise 10K SFF HDD (781518-B21) is fully validated for HPE ProLiant Gen8, Gen9 and all subsequent server generations supporting 2.5-inch SAS drives.
What does the 'SC' designation mean on this HPE HDD?
'SC' stands for Smart Carrier, HPE’s tool-less drive tray design that simplifies hot-swap installation and chassis handling in ProLiant servers.
What performance benefits does the 12 Gb/s SAS interface provide?
The 12 Gb/s SAS interface doubles throughput over 6 Gb/s SAS, delivering sustained high-bandwidth transfers, lower latency, and improved I/O performance for enterprise workloads.
Can I hot-swap the HPE 781518-B21 drive without powering down the server?
Yes. The drive supports hot-swap capability with Smart Carrier in HPE ProLiant servers, allowing safe insertion and removal under full system operation.
What is the warranty coverage for the HPE 1.2 TB SAS 12G Enterprise HDD?
HPE provides a 3-year limited warranty on part number 781518-B21, covering defects in materials and workmanship with service options per HPE’s global warranty terms.
What are the typical enterprise use cases for this 10K RPM SAS drive?
This drive is ideal for transactional databases, virtualization, online transaction processing (OLTP), and mixed application environments requiring consistent low-latency I/O.
How reliable is the HPE 781518-B21 in 24/7 data center operations?
Built to enterprise standards, this drive offers a 1.6 million hour MTBF rating and advanced error recovery controls to ensure continuous availability in mission-critical environments.
What is the power consumption of the HPE 1.2 TB SAS 12G 10K HDD?
Typical power consumption is 6.4 W idle and 9.5 W active read/write, optimized for energy-efficient operation in large-scale deployments.
How do I physically install this HDD in my HPE server?
Simply slide the Smart Carrier–loaded drive into an available 2.5-inch SAS bay on a powered HPE ProLiant Gen8/Gen9 or newer server until it clicks into place.
Does the HPE 781518-B21 support HPE Smart Array controllers?
Yes. It is certified for use with HPE Smart Array controllers and HPE Dynamic Smart Array B-series controllers, ensuring full compatibility and performance.
What is the exact part number and SKU for ordering this HDD?
Order the HPE 1.2 TB SAS 12G Enterprise 10K SFF HDD using part number 781518-B21 or SKU 781518-B21 for global distribution.
Are there any optional service agreements or warranty extensions available?
Yes. HPE offers Care Pack service agreements for extended coverage, including 3-year or 5-year Proactive Care and Mission Critical support options.
How can I monitor the health and status of this SAS drive?
Use HPE Integrated Lights-Out (iLO) and HPE Smart Storage Administrator to view drive health metrics, SMART attributes, and predictive failure alerts in real time.
Can I mix the 1.2 TB 10K SAS drives with SSDs or NL-SAS drives in the same server bay?
Yes. HPE ProLiant servers support mixed drive populations, but performance and RAID configuration guidelines should be followed for optimal results.
What cooling requirements apply to this 2.5-inch enterprise SAS drive?
Ensure proper server airflow per HPE thermal guidance. The drive’s low-profile design and power efficiency help maintain optimal operating temperatures.