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631679-B21
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- HP 1GB FBWC for P-Series Smart Array
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3 Year Extended Warranty
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All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
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If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
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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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Explore more options from Server Expansion Cards or explore other Hpe products.
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
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|---|---|---|---|---|---|
| Bus Width | 64-bit | 64-bit | - | 64-bit | N/A |
| Capture Frame Rate | N/A | N/A | - | N/A | N/A |
| Capture Resolution | N/A | N/A | - | N/A | N/A |
| Card Type | Storage Controller | Storage Controller | - | Storage Controller | Other |
| Chipset / Controller | SN1100E | N/A | - | N/A | N/A |
| Cooling | Passive | Passive | - | Passive | Passive |
| Depth | N/A | N/A | - | N/A | N/A |
| Full Height Bracket | No | Yes | - | No | No |
| Height | N/A | N/A | - | N/A | N/A |
| Interface | PCIe x8 | PCIe x8 | - | PCIe x8 | N/A |
| Low Profile Bracket | Yes | No | - | Yes | No |
| Max Data Rate | N/A | N/A | - | N/A | N/A |
| Operating System Compatibility | Windows / Linux / VMware ESXi | Windows / Linux / VMware ESXi | - | Windows / Linux / VMware ESXi | N/A |
| PCIe Version | PCIe 3.0 | PCIe 3.0 | - | PCIe 3.0 | N/A |
| Port Count | 1 | 2 | - | N/A | N/A |
| Power Requirements | 3.3V | 3.3V | - | 3.3V | N/A |
| Product Name | C8R38A-HP STOREFABRIC SN1100E 16GB SINGLE PORT FIBRE CHANNEL HBA | 726897-B21-HPE Smart Array P840/4GB FBWC 12Gb 2-ports Int SAS Controller | - | 870549-B21-DL38X GEN10 12GB SAS EXPANDER PL SY | 631679-B21-HP 1GB FBWC for P-Series Smart Array |
| Product Type | Expansion Card | Expansion Card | - | Expansion Card | Expansion Card |
| RAID Levels Supported | N/A | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 / JBOD | - | N/A | N/A |
| Supported Ports | SFP+ | N/A | - | N/A | N/A |
| Use Case | Storage Expansion | Storage Expansion | - | Storage Expansion | Storage Expansion |
| Weight | N/A | N/A | - | N/A | N/A |
| Width | N/A | N/A | - | N/A | N/A |
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Questions & Answers
Q
What is the HP 1GB FBWC (SKU: 631679-B21) for P-Series Smart Array?
A
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.
Q
Which HP Smart Array controllers are compatible with this 1GB FBWC?
A
The HP 1GB FBWC (631679-B21) is fully compatible with HP P400, P410, P410i, P411, P610, P800 and later P-Series Smart Array controllers.
Q
How do I install the HP 1GB FBWC on a P-Series Smart Array controller?
A
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.
Q
What performance improvements can I expect from the HP 1GB FBWC?
A
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.
Q
How does Flash-Backed Write Cache protect data during a power outage?
A
In a power failure, the FBWC firmware automatically transfers cached data to onboard flash memory, preserving all write transactions until power is restored.
Q
Does the HP 1GB FBWC require an external battery?
A
No. The HP 1GB FBWC uses integrated flash modules to maintain cached data without the need for an external battery or periodic replacements.
Q
Can I use this FBWC module with RAID 5 or RAID 6 configurations?
A
Yes. The HP 1GB FBWC supports all RAID levels (0, 1, 5, 6, 10, 50, 60) on P-Series Smart Array controllers for optimal data protection and performance.
Q
What warranty does SKU 631679-B21 HP 1GB FBWC include?
A
HP provides a one-year limited warranty on the 1GB FBWC (631679-B21), covering defects in materials and workmanship under normal use.
Q
What is the expected lifespan of the HP 1GB FBWC module?
A
The HP 1GB FBWC is rated for millions of write/erase cycles with up to 10 years of data retention in non-powered state.
Q
Is a firmware update required to deploy the HP 1GB FBWC?
A
Yes. Ensure your P-Series Smart Array controller is running firmware version 6.x or later for full compatibility and optimal performance.
Q
Where can I download the user guide, firmware and drivers for this FBWC?
A
Visit the HP Support website, search for SKU 631679-B21, and download the HP Smart Storage Administrator, firmware updates and installation guide.
Q
How do I troubleshoot HP 1GB FBWC status alerts or errors?
A
Use HP Smart Storage Administrator to check FBWC health; clear error logs, reseat the module and update firmware. Replace if status remains degraded.
Q
Can I upgrade from a battery-backed write cache to the HP 1GB FBWC?
A
Yes. Remove the existing battery-backed write cache module and install the FBWC in the same slot. No additional adapters are required.
Q
What are the physical dimensions of the 1GB FBWC module?
A
The HP 1GB FBWC measures 3.15" × 1.10" × 0.65" (80 × 28 × 17 mm), fitting standard P-Series Smart Array controller slots.
Q
How do I purchase the HP 1GB FBWC (631679-B21)?
A
Order through an authorized HP reseller or the HP online store by searching SKU 631679-B21 and selecting your preferred shipping options.
Q
Does the HP 1GB FBWC support virtualization and database workloads?
A
Yes. The HP 1GB FBWC accelerates high-I/O virtualization, database transactions and mixed workloads by offloading writes to non-volatile cache.
