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PCIe RI mezzanine card delivers fast read performance.
794605-B21
HPE 1.6TB PCIe x4 Lanes Read Intensive Mezzanine 3yr Warrant...
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794605-B21
- Description:
- HPE 1.6TB PCIe x4 Lanes Read Intensive Mezzanine 3yr Warranty Card Supports Gen8 Servers and Beyond
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- Hpe
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3 Year Extended Warranty
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794605-B21 Overview
794605-B21 is a high-performance HDD engineered with a 3.5-inch form factor and a SATA III interface, delivering reliable storage with a 7200 RPM spindle speed and a capacity of 4 TB. Designed for continuous operation, it features a 256 MB cache and an annual workload rating of 300 TB/yr, ensuring optimal performance for data-intensive applications.
Optimized for varied environments including desktops, servers, NAS systems, and surveillance setups, 794605-B21 supports multi-bay deployments while maintaining low power consumption (8 Watts for read/write and 6 Watts when idle). Its advanced features, including a helium-sealed design, vibration protection, and dual actuator technology, make it ideal for demanding use cases in data centers and high-availability storage infrastructures.
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794605-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 210 MB/s
- Annual Workload Rating
- 300 TB/yr
- Power Consumption (Read/Write)
- 8 Watts
- Power Consumption (Idle)
- 6 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
- 794605-B21 High Performance Hard Drive
- Height
- 1.03 inches
- Width
- 5.79 inches
- Depth
- 7.78 inches
- Weight
- 2.0 lbs
794605-B21 Use Case
Real-Time Financial Analytics Acceleration
In a trading firm deploying HPE Gen8 servers, the 794605-B21 HPE 1.6 TB PCIe x4 Read-Intensive Mezzanine Card caches streaming market data and historical tick records. Its high IOPS and low latency ensure sub-millisecond query responses for risk-adjusted pricing and compliance reporting. Outcome: 40% faster trade decision cycles, stronger SLAs, and reduced data-store bottlenecks under peak market load.
High-Density Virtual Desktop Infrastructure (VDI)
An enterprise IT team uses the 794605-B21 card in a Gen8 blade cluster to handle boot storms and user-profile loads across 500+ virtual desktops. The read-optimized SSD delivers consistent performance during concurrent logins and application launches. Outcome: 60% reduction in login times, improved end-user experience, and 30% higher VM density per server.
Edge-Caching for Content Delivery Networks
A telecom operator integrates the 794605-B21 HPE card in edge servers to store frequently accessed video streams and web assets. Leveraging PCIe x4 bandwidth and a 1.6 TB capacity, the system offloads origin traffic and accelerates content delivery. Outcome: 50% lower backbone bandwidth costs, 25% faster page-load times for end users, and scalable caching across Gen8 and newer platforms.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
 794605-B21 |  507284-001 |  P10448-B21 |  Q2T62A |  759210-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 | 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 | 256 MB | 128 MB | 256 MB | 128 MB |
| Average Latency | N/A | N/A | N/A | N/A | N/A |
| Data Transfer Rate | Up to 210 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 210 MB/s |
| Annual Workload Rating | 300 TB/yr | 550 TB/yr | 180 TB/yr | 180 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8 Watts | 8 Watts | 8 W | 8.5 Watts | 8 Watts |
| Power Consumption (Idle) | 6 Watts | 5 Watts | 5 W | 5.6 Watts | 4 Watts |
| Encryption Support | AES 256-bit | AES 256-bit | No | AES 256-bit | AES 256-bit |
| Helium Sealed | Helium-Sealed | No | 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 | N/A | 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 | 794605-B21 High Performance Hard Drive | 507284-001 Enterprise HDD | P10448-B21 4TB 7200RPM Helium-Sealed HDD | Q2T62A Enterprise HDD | 759210-B21 |
| Height | 1.03 inches | 1 inch | 1.00 inches | 1.0 inches | 1.03 inches |
| Width | 5.79 inches | 4 inches | 5.80 inches | 5.8 inches | 5.79 inches |
| Depth | 7.78 inches | 5.79 inches | 4.00 inches | 3.9 inches | 8.66 inches |
| Weight | 2.0 lbs | 2.0 lbs | 2.20 lbs | 2.0 lbs | 2.2 lbs |
Reviews & Ratings
A
Ahsan Farooq
4
Noticeable improvement in latency-sensitive workloads.
I
Ingrid Svensson
5
Stable and powerful solution for Gen8 servers.
N
Noman Siddiq
5
Easy installation and reliable operation.
P
Peter Young
4
Enterprise PCIe storage that performs well.
Questions & Answers
What is the storage capacity of the HPE 794605-B21 Mezzanine Card?
The HPE 794605-B21 Mezzanine Card delivers 1.6 TB of read-intensive NAND flash capacity in a mezzanine form factor.
Which interface and protocol does this card support?
This card uses a PCIe Gen3 x4 interface with NVMe protocol to maximize throughput and I/O performance.
Is the HPE 794605-B21 compatible with HPE Gen8 and later servers?
Yes, the HPE 794605-B21 is fully compatible with HPE ProLiant Gen8, Gen9, Gen10, and later server models.
What workloads are best suited for this read-intensive mezzanine card?
It is optimized for read-intensive applications such as web serving, content delivery, database query acceleration, and analytics.
What are the key performance specifications?
Typical performance reaches up to 200,000 random read IOPS and sustained sequential throughput of 1.5 GB/s.
How long is the manufacturer’s warranty?
This card is backed by a 3-year limited warranty from HPE, covering hardware defects and firmware updates.
How do I install the HPE 794605-B21 in my server?
Power down the server, insert the card into an available mezzanine slot, secure the retention bracket, and power up for automatic detection.
Does the card require special drivers or software?
No special drivers are required; it is supported natively by HPE Smart Array controllers and standard NVMe drivers in modern OS environments.
Can I update the firmware on this mezzanine card?
Yes, firmware can be updated through the HPE Service Pack for ProLiant (SPP) or HPE Smart Update Manager.
Does the HPE 794605-B21 support hardware encryption?
Hardware encryption is managed at the controller level; use HPE Smart Storage encryption features to secure data in flight and at rest.
What is the MTBF (Mean Time Between Failures)?
The card is engineered for reliability with an MTBF rating exceeding 2 million hours under typical operating conditions.
Which operating systems are supported?
It supports major enterprise OS platforms including Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, and VMware ESXi.
How is the HPE 794605-B21 monitored and managed?
Use HPE Smart Storage Administrator (SSA) or HPE System Insights to monitor health, capacity, and performance metrics in real time.
What power consumption should I expect?
Typical active power consumption is 8.4 W, with idle power around 3.5 W to maintain data retention.
Is this mezzanine card hot-swappable?
No, the mezzanine card must be installed or removed with the server powered down according to HPE installation guidelines.
What use cases benefit most from this card?
Ideal use cases include caching layers, database acceleration, virtualization storage tiers, and read-heavy content delivery networks.