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726903-B21
HP SMART ARRAY P841/4GB FBWC 12GB 4PORTS EXT SAS CONTROLLER
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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.
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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.
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.
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.
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Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
P841 controller handles external SAS shelves effortlessly.
Strong RAID performance and cache reliability.
Excellent controller for large storage arrays.
No bottlenecks observed in production.
Enterprise-grade Smart Array controller.
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.
The P841 supports RAID levels 0, 1, 5, 6, 10, 50 and 60, allowing flexible configurations for performance, capacity and redundancy.
With four external 12 Gb/s SAS ports, the P841 can connect up to 256 SAS or SATA drives using appropriate expanders.
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.
The P841 is supported on major enterprise OS platforms including Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server and VMware ESXi.
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.
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.
Yes, when paired with an HPE storage enclosure, the P841 allows hot-swapping of SAS and SATA drives without downtime.
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.
No, the P841 includes a fixed 4 GB FBWC module; HP does not offer higher-capacity cache upgrades for this model.
Use HPE Smart Storage Administrator (SSA) for configuration, monitoring and diagnostics, and the Integrated Management Log (IML) for event tracking.
The P841 draws a maximum of 15 W and utilizes passive cooling via system airflow; ensure proper server ventilation and power budget.
With RAID protection, FBWC and predictive drive failure alerts, the P841 maximizes uptime and safeguards against data loss.
Yes, the P841 supports both SAS and SATA drives on the same configuration, although performance will default to the lowest drive interface.
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.
The P841 is available through HPE authorized resellers, the HPE Online Store and select enterprise IT distributors worldwide.
United States
