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Midline SATA HDD delivered consistent performance.
793665-B21
HPE 4TB SATA 6G Midline 7.2K LFF (3.5in) SC 1yr Warranty 512...
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793665-B21
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- HPE 4TB SATA 6G Midline 7.2K LFF (3.5in) SC 1yr Warranty 512e HDD
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793665-B21 Overview
793665-B21 is a robust 3.5-inch HDD with a SATA III interface, operating at 7200 RPM and offering a storage capacity of 4 TB paired with a 256 MB cache. Designed for demanding environments, this drive features an MTBF of 1,000,000 hours and is rated for 8,760 hours of operation per year, ensuring reliable performance in data centers, desktops, and NAS deployments.
Engineered for heavy workload applications with a 550 TB/yr annual workload rating, the drive delivers efficient performance while consuming approximately 9.0 Watts during read/write operations and 5.0 Watts at idle. With advanced features such as helium-sealed construction, vibration protection, and dual actuator technology, 793665-B21 is ideally suited for surveillance, server, and enterprise storage use cases.
793665-B21 price is is available on request. Get immediate quote.
Request bulk order quote for 793665-B21 for additional pricing. Browse the full Hpe Server 3.5" Hard Drives series or explore all Hpe products.
793665-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)
- 9.0 Watts
- Power Consumption (Idle)
- 5.0 Watts
- Encryption Support
- No
- Helium Sealed
- Helium-Sealed
- Drive Bays Supported
- Multi-bay
- Vibration Protection
- Yes
- Advanced Features
- Dual Actuator
- Operating Temperature
- 5–60°C
- Product Name
- 793665-B21 High Performance Enterprise HDD
- Height
- 1.03 inches
- Width
- 5.79 inches
- Depth
- 4.00 inches
- Weight
- 1.65 lbs
793665-B21 Use Case
Enterprise Backup & Archiving with HPE 4TB SATA 6G Midline HDD
A mid-sized financial services firm implements the HPE 793665-B21 4TB SATA 6G Midline 7.2K LFF HDD in its ProLiant backup servers to store multi-year transaction logs. The drive’s 512e format and optimized sequential writes accelerate nightly backups by up to 30%, ensure compliance-grade retention, and reduce TCO through high-density, cost-effective capacity.
24/7 Video Surveillance Storage for Retail Chains
A national retailer deploys HPE 4TB SATA 6G Midline HDDs in distributed NVR appliances to record HD camera streams across 100+ stores. The 7.2K RPM performance and robust MTBF deliver continuous sequential write throughput, supporting 30-day footage retention per site. This scalable solution lowers hardware spend by 40% versus SSD arrays while maintaining reliable video archiving.
Virtualization & Cloud Workload Expansion
A managed service provider scales its HPE ProLiant virtualization cluster using 793665-B21 4TB SATA 6G Midline HDDs to host customer VMs and containerized applications. The drives’ 512e sector efficiency and HPE Smart Array compatibility enable balanced I/O performance and high-capacity VM storage, increasing VM density by 25% and cutting per-VM storage costs by 35%.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 793665-B21 |  861756-B21 |  846524-B21 |  843266-B21 |  881785-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 / 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 | 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 250 MB/s | Up to 210 MB/s | Up to 250 MB/s | Up to 210 MB/s | Up to 250 MB/s |
| Annual Workload Rating | 550 TB/yr | 300 TB/yr | 300 TB/yr | 300 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 9.0 Watts | 8.0 Watts | 8 W | 8 Watts | 8 Watts |
| Power Consumption (Idle) | 5.0 Watts | 5.0 Watts | 5 W | 4 Watts | 5 Watts |
| Encryption Support | No | 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 | 5–60°C | 5–60°C | 5–60°C | 5–60°C |
| Product Name | 793665-B21 High Performance Enterprise HDD | 861756-B21 | 846524-B21 Enterprise HDD | 843266-B21 4TB Desktop HDD | 881785-B21 Enterprise HDD |
| Height | 1.03 inches | 1.0 inches | 1 in | 1.02 inches | 1.03 inches |
| Width | 5.79 inches | 5.8 inches | 5.79 in | 5.79 inches | 5.8 inches |
| Depth | 4.00 inches | 6.9 inches | 4 in | 4.01 inches | 7.2 inches |
| Weight | 1.65 lbs | 2.0 lbs | 2.0 lbs | 1.5 lbs | 1.6 lbs |
Reviews & Ratings
S
Sajid Hussain
5
Good capacity for general storage.
I
Ivan Petrov
5
OEM quality avoided issues.
R
Rizwan Sheikh
5
Stable under daily workloads.
M
Mikko Heikkinen
5
Reliable and quiet.
Questions & Answers
What are the key specifications of the HPE 4TB SATA 6G Midline 7.2K LFF (3.5in) SC HDD (SKU 793665-B21)?
The HPE 793665-B21 is a 4 TB, 7,200 RPM, SATA 6 Gb/s Midline drive in a 3.5″ form factor with 512e sectors, hot-plug support and a 1-year HPE warranty.
Is the HPE 4TB SATA 6G Midline HDD compatible with my HPE ProLiant server?
Yes, SKU 793665-B21 is fully certified for HPE ProLiant Gen8 and Gen9 servers with SATA backplanes and supports HPE SmartArray controllers.
How do I install the HPE 4TB SATA 6G Midline 7.2K LFF HDD?
Power down your server, insert the drive into an available 3.5″ bay, secure with the drive carrier, then power on and configure via your HPE Smart Array utility.
What performance can I expect from a 7.2K RPM HPE Midline drive?
You can expect sustained sequential reads and writes around 200 MB/s with typical latency under 4.2 ms, ideal for bulk storage and streaming workloads.
What does 512e sector format mean for this HDD?
512e indicates 4,096-byte physical sectors with 512-byte emulation, ensuring legacy OS compatibility while improving data correction efficiency.
Can I include the HPE 4TB Midline drive in RAID arrays?
Yes, this drive works in RAID 0, 1, 5, 6, 10, 50 and 60 configurations when paired with a compatible HPE Smart Array controller.
What warranty coverage is provided with SKU 793665-B21?
HPE supplies a 1-year limited warranty, covering defects in materials and workmanship with global parts replacement service.
Is the HPE 4TB SATA 6G Midline HDD suitable for archival storage?
Yes, its high capacity and optimized power usage make it ideal for cold or warm archival data where performance demands are moderate.
What power consumption should I expect from this 3.5in drive?
The drive typically consumes 7.5 W during read/write operations and under 3 W in idle, helping to reduce server power costs.
Is the HPE 4TB SATA Midline HDD hot-swappable?
Yes, the drive supports hot-plug insertion and removal in any SAS/SATA backplane–enabled 3.5″ bay without system downtime.
What interface does the HPE 793665-B21 drive use?
It uses a standard SATA 6 Gb/s interface, compatible with HPE and third-party SATA controllers supporting 6 Gb/s data rates.
How do I monitor drive health and status?
Use the HPE Smart Storage Administrator or Integrated Lights-Out (iLO) to view SMART attributes, temperature and error statistics.
What are the recommended cooling requirements for this HDD?
Maintain an inlet temperature of 10 °C to 35 °C and ensure airflow of at least 23 CFM per drive bay for optimal operation.
What are the physical dimensions and weight of the drive?
The drive measures 146 mm × 101.6 mm × 25.4 mm (L×W×H) and weighs approximately 675 g, fitting standard 3.5″ drive trays.
How does a Midline HDD differ from an Enterprise HDD?
Midline drives balance cost and capacity with lower duty cycles and slightly higher latency compared to higher-end, 24/7 Enterprise models.
How reliable is the HPE 4TB SATA 6G Midline HDD?
Engineered for 550,000 load/unload cycles and a 0.55% annual failure rate, it offers enterprise-level reliability for general-purpose storage.