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Brian Scott
5
Write intensive SSD delivered consistent results.
804668-B21
HPE 400GB SATA 6G Write Intensive LFF (3.5in) SCC 3yr Warran...
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804668-B21
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- HPE 400GB SATA 6G Write Intensive LFF (3.5in) SCC 3yr Warranty SSD For Use with Gen8 Servers and Beyond
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804668-B21 Overview
804668-B21 is a high-performance HDD engineered for robust computing environments. It features a 3.5-inch form factor with a SATA III interface, operating at 7200 RPM to deliver reliable 4 TB storage capacity alongside a 128 MB cache. The drive’s annual workload rating of 300 TB/yr, combined with an MTBF of 1,000,000 hours and a rated reliability designed for continuous operation, makes it a dependable choice for demanding applications.
Designed with advanced features including a helium-sealed construction, vibration protection, and dual actuator technology, 804668-B21 is optimized for diverse use cases such as data centers, desktops, NAS, and surveillance systems. Its energy-efficient power consumption further enhances its suitability for both enterprise and cost-sensitive operations across server and storage platforms.
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Request bulk order quote for 804668-B21 for additional pricing. Browse the full Hpe Server 3.5" Hard Drives series or explore all Hpe products.
804668-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)
- 128 MB
- Average Latency
- N/A
- Data Transfer Rate
- Up to 250 MB/s
- Annual Workload Rating
- 300 TB/yr
- Power Consumption (Read/Write)
- 8 Watts
- Power Consumption (Idle)
- 4 Watts
- Encryption Support
- AES 256-bit
- Helium Sealed
- Helium-Sealed
- Drive Bays Supported
- Single / Multi-bay
- Vibration Protection
- Yes
- Advanced Features
- Dual Actuator
- Operating Temperature
- 5–60°C
- Product Name
- 804668-B21 Enterprise HDD
- Height
- 1.03 inches
- Width
- 5.79 inches
- Depth
- 4.00 inches
- Weight
- 3.5 lbs
804668-B21 Use Case
Accelerating OLTP Databases on HPE Gen8 Servers with 804668-B21 HPE 400GB SATA 6G Write-Intensive SSD
Scenario: A mid-size e-commerce business struggles with slow order-processing and inventory updates during peak sale events. Implementation: Integrate the HPE 804668-B21 400GB SATA 6G Write-Intensive LFF SSD into an HPE ProLiant Gen8 RAID-10 array to optimize write cache and sustain high IOPS. Outcome: Achieves 60% lower transaction latency, 2.5× higher throughput under load and maintains ACID compliance – boosting customer experience and protecting revenue during traffic surges.
Boosting VDI Performance in Remote Workforce Deployments with HPE 804668-B21 SSD
Scenario: A global enterprise rolls out 500 concurrent virtual desktops, experiencing slow boot storms and I/O contention on legacy drives. Implementation: Replace spinning disks with HPE 804668-B21 400GB SATA 6G Write-Intensive SSDs in each HPE ProLiant Gen8 host, configured for tiered caching. Outcome: Reduces boot-storm times by 50%, doubles IOPS per user and shrinks storage footprint by 40%, delivering seamless user experience and simplified management for IT operations.
Real-Time Big Data Ingestion and Analytics on HPE Gen8 with 804668-B21 SSD
Scenario: An IoT platform needs sustained write throughput for real-time sensor data ingest and analytics without batch delays. Implementation: Deploy HPE 804668-B21 400GB SATA 6G Write-Intensive SSDs as the hot tier in HPE ProLiant Gen8 servers, paired with a fast NVMe cache for mixed workloads. Outcome: Sustains 2,000 MB/s write bandwidth, delivers sub-second query response on streaming data and reduces total storage TCO by 30%, enabling instant insights and faster decision-making.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 804668-B21 |  Q2P86A |  816923-B21 |  877784-B21 |  819203-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 | 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 | 8 TB |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache (Buffer Size) | 128 MB | 128 MB | 128 MB | 256 MB | 512 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 210 MB/s | Up to 250 MB/s | Up to 250 MB/s |
| Annual Workload Rating | 300 TB/yr | 180 TB/yr | 300 TB/yr | 550 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 8 Watts | 8 Watts | 8 Watts | 8 Watts | 8 Watts |
| Power Consumption (Idle) | 4 Watts | 6 Watts | 5 Watts | 4 Watts | 5 Watts |
| Encryption Support | AES 256-bit | 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 | Single / Multi-bay | Multi-bay | Multi-bay | Multi-bay | Multi-bay |
| Vibration Protection | Yes | Yes | Yes | Yes | Yes |
| Advanced Features | Dual Actuator | Dual Actuator | Rotational Vibration Sensors | Dual Actuator | Dual Actuator |
| Operating Temperature | 5–60°C | 5–55°C | 5–60°C | 5–55°C | 5–60°C |
| Product Name | 804668-B21 Enterprise HDD | Q2P86A High-Performance Enterprise HDD | 816923-B21 Enterprise HDD | 877784-B21 Enterprise Performance HDD | 819203-B21 Enterprise HDD |
| Height | 1.03 inches | 1.04 inches | 1.03 inches | 1.03 inches | 1.03 inches |
| Width | 5.79 inches | 4 inches | 5.79 inches | 5.79 inches | 5.79 inches |
| Depth | 4.00 inches | 5.79 inches | 4.0 inches | 8.74 inches | 4.01 inches |
| Weight | 3.5 lbs | 3.3 lbs | 2.0 lbs | 2.2 lbs | 2.1 lbs |
Reviews & Ratings
S
Saad Khan
5
Good endurance for heavy workloads.
A
Alexei Morozov
4
Easy to deploy in existing setup.
R
Rameez Butt
5
Reliable SSD choice.
V
Ville Koskinen
4
Strong enterprise performance.
Questions & Answers
What is the storage capacity of the HPE 804668-B21 SSD?
The HPE 804668-B21 SSD provides 400 GB of usable capacity, ideal for write-intensive applications.
Which interface does the HPE 400 GB SATA 6G Write Intensive LFF SSD use?
This drive uses a SATA 6 Gb/s interface, ensuring broad compatibility and reliable data transfer rates.
What form factor is the HPE 804668-B21 SSD?
It is a Large Form Factor (LFF) 3.5-inch SSD designed for standard server bays.
For which workloads is this SSD optimized?
The SSD is write-intensive, optimized for high-transaction databases, logging, and other heavy-write applications.
Which HPE server generations are supported by SKU 804668-B21?
It is certified for HPE Gen8 servers and all later platforms, ensuring seamless integration.
What warranty coverage is included with the HPE 400 GB SATA Write Intensive SSD?
HPE backs this SSD with a three-year limited warranty and optional HPE Care Pack extensions.
What endurance rating does this write-intensive SSD offer?
It delivers up to 10 full drive writes per day (10 DWPD) over the three-year warranty period.
What are the key performance specifications?
The SSD achieves up to 515 MB/s sequential read, 430 MB/s sequential write, 41,000 IOPS random read, and 37,000 IOPS random write.
How do I install the HPE 804668-B21 SSD in my server?
Insert it into any standard 3.5″ drive bay using the included Smart Carrier caddy; the system will auto-detect the drive.
Is the HPE 400 GB SATA SSD hot-swappable?
Yes. It supports hot-swap operations, allowing drive replacement without powering down the server.
How can I monitor and manage this SSD?
Use HPE Smart Storage Administrator or HPE iLO to view drive health, firmware status, and performance metrics.
Does the SSD support SMART reporting?
Yes. It supports S.M.A.R.T. features for proactive monitoring and early failure detection.
Can I mix this write-intensive SSD with HDDs in the same array?
Yes. You can mix SSDs and HDDs in the same enclosure; configure tiers or volumes according to your performance needs.
How does this write-intensive SSD compare to a read-intensive model?
Compared to read-intensive SSDs, it offers significantly higher endurance and sustained write performance for heavy-write workloads.
How do I obtain firmware updates for the SSD?
Download the latest firmware from the HPE Support Center and apply updates via HPE Smart Storage Administrator.
What is included in the Smart Carrier (SCC) design?
The Smart Carrier includes an integrated activity LED and hardware encryption support, simplifying install and security.