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10Gb adapter worked reliably across hosts.
766490-B21
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HP FLEXFABRIC 10GB 2-PORT 536FLB ADAPTER
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766490-B21
- Description:
- HP FLEXFABRIC 10GB 2-PORT 536FLB ADAPTER
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766490-B21 Overview
766490-B21 is a high-performance SAN storage system built in a rackmount form factor that offers 12 drive bays supporting a mixed array of drive types including SATA HDD, SAS HDD, SATA SSD, and NVMe SSD. It delivers a total capacity of up to 512 TB and supports RAID configurations such as RAID 0, RAID 1, RAID 5, and RAID 10 for optimal data protection and performance.
Engineered with an Intel Xeon processor featuring 8 cores and 16 GB of pre-installed ECC DDR4 memory (expandable to 64 GB), 766490-B21 integrates advanced interfaces including USB 3.2 and 10GbE network ports across 4 LAN ports with optional Fibre Channel connectivity. Its design includes expansion support, redundant cooling via a redundant fan, and a redundant 750W power supply, making it ideal for use cases such as SMB backup, enterprise data centers, virtualization, and media server deployments.
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766490-B21 Specifications
- Product Type
- Storage System
- Storage Type
- SAN
- Form Factor
- Rackmount
- Bay Count
- 12-bay
- Supported Drive Types
- Mixed
- Hot-Swap Support
- Yes
- Max Supported Capacity
- 512 TB
- RAID Support
- RAID 0 / RAID 1 / RAID 5 / RAID 10
- CPU Type
- Intel Xeon
- CPU Cores
- 8
- Installed RAM
- 16 GB
- Max RAM Capacity
- 64 GB
- RAM Type
- ECC DDR4
- Network Ports
- 10GbE
- LAN Ports
- 4
- USB Ports
- USB 3.2
- Expansion Support
- Yes
- Cooling
- Redundant Fan
- Power Supply
- Redundant
- Power Supply Wattage
- 750W
- Operating System
- Custom OS
- Snapshot Support
- Yes
- Cloud Sync Support
- Yes
- Virtualization Ready
- Yes
- iSCSI Support
- Yes
- Surveillance Support
- No
- Use Case
- Enterprise Data Center
- Product Name
- 766490-B21 High-Performance SAN Storage System
- Height
- 3.5 inches
- Width
- 17.5 inches
- Depth
- 28.5 inches
- Weight
- 35 lbs
766490-B21 Use Case
Enterprise Data Center Virtualization with HP FlexFabric 10Gb 2-Port 536FLB Adapter (766490-B21)
In a large-scale VMware or Microsoft Hyper-V environment, IT architects deploy the HP FlexFabric 10GB 2-Port 536FLB Adapter (766490-B21) to consolidate storage, management, and VM traffic on two high-performance 10GbE ports. Hardware offloads (NVGRE, VXLAN, iSCSI, and RDMA) free up CPU cycles, enabling up to 30% higher VM density per host. Outcome: streamlined network architecture, lower TCO, and predictable, low-latency performance for mission-critical applications.
Hybrid Cloud Connectivity and Tenant Isolation for Multi-Tenant Service Providers
Cloud service providers leverage the HP FlexFabric 10Gb 2-Port 536FLB Adapter (766490-B21) in HPE ProLiant servers to unify Ethernet and storage fabrics. Network-partitioning (NPAR) creates up to four FlexNICs per port for secure multi-tenant segmentation, while SR-IOV accelerates VM-to-cloud data transfers. Outcome: scalable and secure hybrid cloud connectivity, simplified fabric management, and guaranteed bandwidth per tenant, driving SLA compliance and higher customer satisfaction.
High-Availability Virtual Desktop Infrastructure (VDI) Deployments
In Citrix or VMware Horizon VDI farms, the HP FlexFabric 10Gb 2-Port 536FLB Adapter (766490-B21) delivers redundant 10GbE links with Dynamic Failover and RSS-based load balancing. By offloading TCP/IP and iSCSI processing, boot storms and user login surges are absorbed without CPU contention. Outcome: accelerated desktop provisioning, sub-second login times, and continuous availability—ensuring a seamless end-user experience and simplified network operations.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 766490-B21 |  867331-B21 |  BS668A |  BK835A |  BB916A | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | SAN | SAN | SAN | SAN | SAN |
| Form Factor | Rackmount | Rackmount | Rackmount | Rackmount | Rackmount |
| Bay Count | 12-bay | 12-bay | 16-bay | 8-bay | 24-bay |
| Supported Drive Types | Mixed | Mixed | SATA HDD / SAS HDD / SATA SSD / NVMe SSD | Mixed | SATA HDD / SAS HDD / SATA SSD / NVMe SSD |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
| Max Supported Capacity | 512 TB | 192 TB | 512 TB | 256 TB | 512 TB |
| RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 10 | 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 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
| CPU Type | Intel Xeon | Intel Xeon | Intel Xeon | Intel Xeon | Intel Xeon |
| CPU Cores | 8 | 8 | 8 | 8 | 8 |
| Installed RAM | 16 GB | 16 GB | 16 GB | 16 GB | 16 GB |
| Max RAM Capacity | 64 GB | 64 GB | 128 GB | 64 GB | 64 GB |
| RAM Type | ECC DDR4 | ECC DDR4 | DDR4 | ECC DDR4 | DDR4 |
| Network Ports | 10GbE | 10GbE | 10GbE | 10GbE | 10GbE |
| LAN Ports | 4 | 4 | 2 | 4 | 2 |
| USB Ports | USB 3.2 | USB 3.0 | USB 3.2 | USB 3.2 | USB 3.0 |
| Expansion Support | Yes | Yes | Yes | Yes | Yes |
| Cooling | Redundant Fan | Redundant Fan | Active | Active | Redundant Fan |
| Power Supply | Redundant | Redundant | Redundant | Redundant | Redundant |
| Power Supply Wattage | 750W | 500W | 350W | 350W | 500W |
| Operating System | Custom OS | Custom OS | Custom OS | Custom OS | Custom OS |
| Snapshot Support | Yes | Yes | Yes | Yes | Yes |
| Cloud Sync Support | Yes | Yes | Yes | Yes | Yes |
| Virtualization Ready | Yes | Yes | Yes | Yes | Yes |
| iSCSI Support | Yes | Yes | Yes | Yes | Yes |
| Surveillance Support | No | No | No | No | No |
| Use Case | Enterprise Data Center | Enterprise Data Center | Enterprise Data Center / Virtualization / Media Server | Enterprise Data Center | Enterprise Data Center |
| Product Name | 766490-B21 High-Performance SAN Storage System | 867331-B21 Enterprise Storage Array | BS668A Enterprise Storage System | BK835A Storage System | BB916A High-Performance SAN Storage System |
| Height | 3.5 inches | 3.5 inches | 3.5 inches | 3.5 inches | 5.25 inches |
| Width | 17.5 inches | 17.5 inches | 17.3 inches | 17.5 inches | 17.5 inches |
| Depth | 28.5 inches | 28 inches | 28.7 inches | 27.5 inches | 28 inches |
| Weight | 35 lbs | 45 lbs | 55 lbs | 35 lbs | 45 lbs |
Reviews & Ratings
U
Usman Ashraf
4
Good driver support.
T
Tobias Frank
5
Easy installation.
K
Kari Savolainen
5
Stable throughput.
N
Neil Hart
4
Satisfied.
Questions & Answers
What is the HP FlexFabric 10Gb 2-port 536FLB adapter (SKU 766490-B21)?
The HP FlexFabric 10Gb 2-port 536FLB adapter (SKU 766490-B21) is a dual-port converged network adapter delivering 10Gb Ethernet and Fibre Channel over Ethernet (FCoE) for HPE ProLiant servers.
What are the key features of the HP FlexFabric 536FLB adapter?
Key features include two integrated 10Gb SFP+ ports, FCoE support, offload acceleration, VMware and Microsoft Hyper-V compatibility, and optimized power efficiency.
Which servers are compatible with the HP FlexFabric 536FLB adapter?
The adapter is certified for HPE ProLiant Gen8 and Gen9 rack and blade servers with FLB slot support, including DL360, DL380 and BL460 platforms.
What operating systems does the HP FlexFabric 536FLB adapter support?
Supported OSes include VMware ESXi, Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server and VMware vSphere.
How do I install the HP FlexFabric 536FLB adapter in a ProLiant server?
Power down the server, remove the blank FLB slot cover, align and insert the adapter into the FLB slot, secure the latch, install SFP+ transceivers, then power on and update drivers.
What type of SFP+ transceivers does the adapter support?
This adapter supports HPE genuine 10Gb SFP+ SR, LR, and DAC transceivers for multimode, single-mode and direct attach copper connectivity.
Can I use this adapter for virtualization and converged networking?
Yes, the FlexFabric 536FLB adapter is optimized for virtual workloads and converged I/O, consolidating Ethernet, FCoE and iSCSI traffic over a single connection.
What bandwidth and throughput does the HP FlexFabric 536FLB adapter deliver?
Each SFP+ port delivers up to 10Gb/s line rate performance, for a total of 20Gb/s full-duplex throughput across both ports.
Does the HP FlexFabric 536FLB adapter support NIC teaming?
Yes, it supports HPE Network Fault Tolerance (NFT) and link aggregation (802.3ad) for uplink redundancy and increased bandwidth.
What is the power consumption of the HP FlexFabric 536FLB adapter?
Typical power consumption is 4.5W per port under load, with low-power idle states to reduce energy use.
How can I update the firmware on the HP FlexFabric 536FLB adapter?
Update firmware via HPE Smart Update Manager (SUM) or Service Pack for ProLiant (SPP) using integrated Lights-Out (iLO) for seamless deployment.
What cabling options are compatible with this adapter?
Compatible cabling includes OM3/OM4 multimode fiber for SR optics, single-mode fiber for LR optics, and passive/active DAC cables up to 10m.
Is the HP FlexFabric 536FLB adapter hot-pluggable?
No, the adapter must be installed or removed while the server is powered down to ensure proper FLB slot alignment and system integrity.
What is the warranty for the HP FlexFabric 536FLB adapter?
HPE provides a three-year limited warranty with worldwide support, including next-business-day parts replacement and telephone assistance.
How does the FlexFabric adapter improve data center efficiency?
By consolidating Ethernet and storage traffic on two 10Gb links, it reduces cabling, lowers power consumption and simplifies management for higher efficiency.
Where can I purchase genuine HP FlexFabric 10Gb 2-port 536FLB adapters?
You can purchase through HPE authorized resellers, the HPE online store or certified channel partners to ensure genuine parts and full support.