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FBWC improved write safety significantly.
631679-B21
HP 1GB FBWC for P-Series Smart Array
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Name:
631679-B21
- Description:
- HP 1GB FBWC for P-Series Smart Array
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- Hpe
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3 Year Extended Warranty
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631679-B21 Overview
631679-B21-HP 1GB FBWC for P-Series Smart Array is a specialized flash-backed write cache module engineered to augment the performance of HP’s P-Series Smart Array controllers in enterprise storage solutions. Designed as an internal expansion component, it enhances data integrity and write performance without relying on traditional expansion interfaces such as PCIe or Ethernet, making it an essential upgrade for high-demand server environments.
This module features a compact, passive design ideal for low-profile server configurations and is optimized for integration within HP systems, ensuring reliable storage expansion and performance boosts. Its robust design and targeted functionality make it a key component for enhancing RAID operations and overall system responsiveness in demanding data center applications.
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631679-B21 Specifications
- Product Type
- Expansion Card
- Card Type
- Other
- Interface
- N/A
- PCIe Version
- N/A
- Chipset / Controller
- N/A
- Supported Ports
- N/A
- Port Count
- N/A
- Max Data Rate
- N/A
- RAID Levels Supported
- N/A
- Capture Resolution
- N/A
- Capture Frame Rate
- N/A
- Low Profile Bracket
- No
- Full Height Bracket
- No
- Cooling
- Passive
- Operating System Compatibility
- N/A
- Bus Width
- N/A
- Power Requirements
- N/A
- Use Case
- Storage Expansion
- Product Name
- 631679-B21-HP 1GB FBWC for P-Series Smart Array
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
631679-B21 Use Case
Accelerated Transactional Database Performance for E-Commerce
In a high-volume e-commerce environment running HP P-Series Smart Array controllers, the 631679-B21 1 GB Flash-Backed Write Cache (FBWC) is deployed to cache write-intensive SQL workloads. During peak sale events, write latency is reduced by up to 30%, guaranteeing ACID compliance and uninterrupted order processing. If a power failure occurs, cached transactions are preserved in onboard flash, eliminating data corruption and ensuring immediate recovery—delivering sustained throughput, zero data loss and elevated customer trust.
Optimizing VMware VDI Boot Storms with HP 1 GB FBWC
In a virtual desktop infrastructure supporting thousands of concurrent users, the HP 631679-B21 FBWC module accelerates write-back caching on P-Series Smart Array controllers. By offloading metadata and write commits to high-speed flash, concurrent VM boot storms complete 50% faster, reducing login delays and helpdesk tickets. Power disruptions trigger FBWC’s flash retention, guaranteeing virtual machine consistency and minimizing downtime—yielding superior user experience and lower operational costs.
Remote Office Backup Integrity and Rapid Disaster Recovery
For distributed branch offices with intermittent power and limited IT staff, the HP 1 GB FBWC safeguards scheduled backups to local disk arrays. Write operations complete reliably even during outage events, with cached data preserved in non-volatile flash until power is restored. This ensures 100% backup integrity, zero in-flight data loss and sub-hour recovery objectives—streamlining compliance, reducing RPO/RTO and empowering centralized IT to manage DR from headquarters.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 631679-B21 |  726897-B21 |  P9M75A |  870549-B21 |  C8R38A | |
|---|---|---|---|---|---|
| Product Type | Expansion Card | Expansion Card | Expansion Card | Expansion Card | |
| Card Type | Other | Storage Controller | Storage Controller | Storage Controller | |
| Interface | N/A | PCIe x8 | PCIe x8 | PCIe x8 | |
| PCIe Version | N/A | PCIe 3.0 | PCIe 3.0 | PCIe 3.0 | |
| Chipset / Controller | N/A | N/A | N/A | SN1100E | |
| Supported Ports | N/A | N/A | N/A | SFP+ | |
| Port Count | N/A | 2 | N/A | 1 | |
| Max Data Rate | N/A | N/A | N/A | N/A | |
| RAID Levels Supported | N/A | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 / JBOD | N/A | N/A | |
| Capture Resolution | N/A | N/A | N/A | N/A | |
| Capture Frame Rate | N/A | N/A | N/A | N/A | |
| Low Profile Bracket | No | No | Yes | Yes | |
| Full Height Bracket | No | Yes | No | No | |
| Cooling | Passive | Passive | Passive | Passive | |
| Operating System Compatibility | N/A | Windows / Linux / VMware ESXi | Windows / Linux / VMware ESXi | Windows / Linux / VMware ESXi | |
| Bus Width | N/A | 64-bit | 64-bit | 64-bit | |
| Power Requirements | N/A | 3.3V | 3.3V | 3.3V | |
| Use Case | Storage Expansion | Storage Expansion | Storage Expansion | Storage Expansion | |
| Product Name | 631679-B21-HP 1GB FBWC for P-Series Smart Array | 726897-B21-HPE Smart Array P840/4GB FBWC 12Gb 2-ports Int SAS Controller | 870549-B21-DL38X GEN10 12GB SAS EXPANDER PL SY | C8R38A-HP STOREFABRIC SN1100E 16GB SINGLE PORT FIBRE CHANNEL HBA | |
| Height | N/A | N/A | N/A | N/A | |
| Width | N/A | N/A | N/A | N/A | |
| Depth | N/A | N/A | N/A | N/A | |
| Weight | N/A | N/A | N/A | N/A |
Reviews & Ratings
H
Hamza Riaz
4
Battery integrated cleanly.
J
Johan Nyberg
5
Consistent cache protection.
P
Paul Denton
3
Essential Smart Array accessory.
M
Marek Lewandowski
4
Reliable component.
Questions & Answers
What is the HP 1GB FBWC (SKU: 631679-B21) for P-Series Smart Array?
The HP 1GB FBWC (Flash-Backed Write Cache) is a 1GB non-volatile cache module that enhances write performance and safeguards data on HP P-Series Smart Array controllers.
Which HP Smart Array controllers are compatible with this 1GB FBWC?
The HP 1GB FBWC (631679-B21) is fully compatible with HP P400, P410, P410i, P411, P610, P800 and later P-Series Smart Array controllers.
How do I install the HP 1GB FBWC on a P-Series Smart Array controller?
Power down the server, open the Smart Array slot, insert the FBWC module firmly until it clicks, close the slot cover, then power on and verify in the HP Smart Storage Administrator.
What performance improvements can I expect from the HP 1GB FBWC?
By caching write operations in flash memory, the HP 1GB FBWC delivers up to 90% faster sequential and random write performance on P-Series Smart Array RAID volumes.