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726903-B21
- Description:
- HP SMART ARRAY P841/4GB FBWC 12GB 4PORTS EXT SAS CONTROLLER
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3 Year Extended Warranty
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Larger orders are dispatched through freight forwarding partners. Delivery takes 7–10 business days, globally.
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Our best-in-class warranties
3-Year Extended Warranty
Extended protection, enterprise-grade.
All enterprise hardware is backed by a 3-year warranty — triple the industry standard — covering defects under normal use.
Professional repairs & replacements.
If a hardware issue is confirmed, we’ll repair or replace the unit. Replacement parts carry either original or 3-month coverage.
RMA process, simplified.
Once an RMA is approved, return the defective unit within 10 days. We handle the rest — no service gaps.
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Your warranty covers defects under normal use. For continued protection, avoid accidental damage, unauthorized repairs, third-party parts, or extreme environments.
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In some regions, return-to-factory or remote service may apply. On-site service depends on infrastructure availability.
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Refund or restock, your call.
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30-Day Hardware Replacement
Covered for any early faults.
All equipment includes a 30-day replacement warranty. If something goes wrong, we’ll repair or swap it — fast.
Replacements shipped in 10 days or less.
Once your return is inspected and approved, we dispatch the replacement promptly to keep your operations moving.
RMA protocol keeps it smooth.
Just ensure all accessories and original packaging are intact — we’ll take care of the technical validation.
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726903-B21 Overview
726903-B21-HP SMART ARRAY P841/4GB FBWC 12GB 4PORTS EXT SAS CONTROLLER is an enterprise-class storage controller expansion card engineered for high-performance server environments. Designed with advanced SAS connectivity, this RAID controller offers reliable data protection and management, featuring hardware RAID capabilities and support for multiple RAID levels to enhance storage efficiency and fault tolerance.
This card integrates a PCIe x8 interface operating on the PCIe 3.0 standard, leveraging the HP Smart Array P841 controller to deliver robust storage expansion and server enhancement solutions. Its 4-port external SAS configuration, passive cooling design, low-profile and full height bracket options, and broad OS compatibility—including Windows, Linux, VMware ESXi, and FreeBSD—make it ideal for mission-critical data environments.
What is the price of 726903-B21?
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Explore more options from Server Expansion Cards or explore other Hpe products.
726903-B21 Specifications
| Product Type | Expansion Card |
| Card Type | Storage Controller |
| Interface | PCIe x8 |
| PCIe Version | PCIe 3.0 |
| Chipset / Controller | HP Smart Array P841 |
| Supported Ports | N/A |
| Port Count | 4 |
| Max Data Rate | N/A |
| RAID Levels Supported | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 |
| Capture Resolution | N/A |
| Capture Frame Rate | N/A |
| Low Profile Bracket | Yes |
| Full Height Bracket | Yes |
| Cooling | Passive |
| Operating System Compatibility | Windows / Linux / VMware ESXi / FreeBSD |
| Bus Width | 64-bit |
| Power Requirements | 3.3V |
| Use Case | Storage Expansion / Server Expansion |
| Product Name | 726903-B21-HP SMART ARRAY P841/4GB FBWC 12GB 4PORTS EXT SAS CONTROLLER |
| Height | N/A |
| Width | N/A |
| Depth | N/A |
| Weight | N/A |
726903-B21 Use Case
Tier-1 Database Acceleration in Financial Services
In global financial services data centers, the 726903-B21 HP Smart Array P841/4GB FBWC 12Gb 4-port external SAS controller accelerates mission-critical Oracle OLTP and Microsoft SQL Server workloads. By delivering sub-millisecond latency and 4× higher IOPS, it ensures continuous trading operations, strict SLA adherence and real-time analytics capabilities.
Scalable Virtualization and VDI Performance Optimization
In enterprise virtual desktop infrastructure (VDI) clusters supporting over 2,500 sessions, the 726903-B21 HP Smart Array P841 leverages 12Gb SAS channels and 4GB Flash-Backed Write Cache to expedite VM boot storms and I/O-intensive applications. The result is a 45% reduction in boot times, a 50% increase in VM density per server and a lowered TCO through optimized hardware utilization.
High-Speed Backup & Disaster Recovery Data Protection
In hybrid IT environments requiring robust backup and disaster recovery, the 726903-B21 HP Smart Array P841’s four external SAS ports interface with tape libraries, disk backup appliances and remote JBOD enclosures. This configuration doubles backup throughput, maintains data integrity with Flash-Backed Write Cache and meets aggressive RPO/RTO objectives for critical business continuity.
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 | 64-bit |
| 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 | RAID Controller |
| Chipset / Controller | HP Smart Array P841 | HP Smart Array P440 | - | HPE Smart Array | HPE Smart Array P440 |
| Cooling | Passive | Passive | - | Passive | Passive |
| Depth | N/A | 7.9 inches | - | 10.0 inches | N/A |
| Full Height Bracket | Yes | Yes | - | No | Yes |
| Height | N/A | 1.5 inches | - | 1.2 inches | N/A |
| Interface | PCIe x8 | PCIe x8 | - | PCIe x8 | PCIe x8 |
| Low Profile Bracket | Yes | Yes | - | Yes | Yes |
| Max Data Rate | N/A | N/A | - | N/A | N/A |
| Operating System Compatibility | Windows / Linux / VMware ESXi / FreeBSD | Windows / Linux / VMware ESXi | - | Windows / Linux / VMware ESXi | Windows / Linux / VMware ESXi |
| PCIe Version | PCIe 3.0 | N/A | - | PCIe 3.0 | PCIe 3.0 |
| Port Count | 4 | 1 | - | 8 | 1 |
| Power Requirements | 3.3V | 3.3V | - | 3.3V | 3.3V |
| Product Name | 726903-B21-HP SMART ARRAY P841/4GB FBWC 12GB 4PORTS EXT SAS CONTROLLER | 726821-B21-HP SMART ARRAY P440/4GB FBWC 12GB 1PORT INT SAS CONTROLLER | - | 804405-B21-SMART ARRAY P408E-P SR GEN10 CTRLR PL=SI | 820834-B21-HPE Smart Array P440/2GB FBWC 12Gb 1-port Int SAS Controller |
| Product Type | Expansion Card | Expansion Card | - | Expansion Card | Expansion Card |
| RAID Levels Supported | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | - | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 / RAID 50 / RAID 60 |
| Supported Ports | N/A | N/A | - | N/A | N/A |
| Use Case | Storage Expansion / Server Expansion | Storage Expansion | - | Storage Expansion | Storage Expansion |
| Weight | N/A | 1.2 lbs | - | 2.5 lbs | N/A |
| Width | N/A | 4.7 inches | - | 8.0 inches | N/A |
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Questions & Answers
Q
What is the HP Smart Array P841/4GB FBWC 12GB 4-ports external SAS controller?
A
The HP Smart Array P841 is a hardware RAID controller with 4 GB of flash-backed write cache (FBWC) and four external 12 Gb/s SAS ports, designed for enterprise servers to deliver high-throughput, low-latency storage connectivity.
Q
Which RAID levels does the P841 controller support?
A
The P841 supports RAID levels 0, 1, 5, 6, 10, 50 and 60, allowing flexible configurations for performance, capacity and redundancy.
Q
How many external SAS drives can I connect to this controller?
A
With four external 12 Gb/s SAS ports, the P841 can connect up to 256 SAS or SATA drives using appropriate expanders.
Q
What is FBWC and why is it important?
A
Flash-backed write cache (FBWC) uses supercapacitors and non-volatile flash to protect cached data during power loss, ensuring safe write operations and quick recovery.
Q
What operating systems are compatible with the P841 controller?
A
The P841 is supported on major enterprise OS platforms including Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server and VMware ESXi.
Q
Can I upgrade the firmware on the P841 controller?
A
Yes, HP provides firmware updates via the Online ROM Flash Tool (OFR) and HPE Service Pack for ProLiant (SPP) to ensure optimal performance and compatibility.
Q
How do I install the HP Smart Array P841 in my server?
A
Power down the server, insert the P841 into an available PCIe slot, secure it, attach external SAS cables, then power on and configure RAID in the Intelligent Provisioning or ORCA utility.
Q
Does the P841 support hot-swappable drive bays?
A
Yes, when paired with an HPE storage enclosure, the P841 allows hot-swapping of SAS and SATA drives without downtime.
Q
What performance can I expect with the P841 controller?
A
The P841 delivers up to 12 Gb/s per port, low I/O latency and up to 4 GB of write-cache bandwidth, ideal for high-I/O database and virtualization workloads.
Q
Is the 4 GB FBWC upgradeable?
A
No, the P841 includes a fixed 4 GB FBWC module; HP does not offer higher-capacity cache upgrades for this model.
Q
Which management tools work with the P841 controller?
A
Use HPE Smart Storage Administrator (SSA) for configuration, monitoring and diagnostics, and the Integrated Management Log (IML) for event tracking.
Q
What are the power and cooling requirements?
A
The P841 draws a maximum of 15 W and utilizes passive cooling via system airflow; ensure proper server ventilation and power budget.
Q
How does the P841 enhance data availability?
A
With RAID protection, FBWC and predictive drive failure alerts, the P841 maximizes uptime and safeguards against data loss.
Q
Can I mix SAS and SATA drives on this controller?
A
Yes, the P841 supports both SAS and SATA drives on the same configuration, although performance will default to the lowest drive interface.
Q
What kind of warranty and support does HPE offer?
A
HPE provides a standard one-year warranty with options to extend up to three years of parts, labor and next-business-day on-site service.
Q
Where can I purchase the HP Smart Array P841 controller?
A
The P841 is available through HPE authorized resellers, the HPE Online Store and select enterprise IT distributors worldwide.
