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FIO adapter delivered consistent 10Gb connectivity.
766491-B21
HP FLEXFABRIC 10GB 2PORT 536FLB FIO ADAPTER
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766491-B21
- Description:
- HP FLEXFABRIC 10GB 2PORT 536FLB FIO ADAPTER
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766491-B21 Overview
766491-B21 is a high-performance NAS storage system featuring a 12-bay design that supports Mixed drive types—including SATA, SAS, SSD, and NVMe—to deliver a total storage capacity of up to 512 TB. It offers comprehensive RAID support (RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10), is powered by an Intel Xeon processor with 8 cores, and comes with 16 GB of pre-installed ECC DDR4 memory that can be expanded to 64 GB.
This robust system provides versatile connectivity with USB 3.2 ports and a 10GbE network interface, along with expansion support for future scalability. Featuring a redundant power supply rated at 500W and active cooling, 766491-B21 is engineered for critical applications such as SMB backup, enterprise data centers, virtualization, and media server deployments.
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766491-B21 Specifications
- Product Type
- Storage System
- Storage Type
- NAS
- 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 6 / 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
- 2
- USB Ports
- USB 3.2
- Expansion Support
- Yes
- Cooling
- Active
- Power Supply
- Redundant
- Power Supply Wattage
- 500W
- Operating System
- Custom OS
- Snapshot Support
- Yes
- Cloud Sync Support
- Yes
- Virtualization Ready
- Yes
- iSCSI Support
- Yes
- Surveillance Support
- Yes
- Use Case
- Enterprise Data Center
- Product Name
- 766491-B21 Storage System
- Height
- 3 inches
- Width
- 17 inches
- Depth
- 19 inches
- Weight
- 30 lbs
766491-B21 Use Case
Virtualized Data Center Network Convergence with 766491-B21 HP FLEXFABRIC 10GB 2Port 536FLB FIO Adapter
In a VMware vSphere enterprise environment consolidating network and storage traffic, the 766491-B21 adapter delivers dual 10 GbE ports with FCoE and RDMA offload. This setup reduces server CPU utilization by up to 30%, lowers latency below 50 μs, and boosts VM density. Outcome: accelerated VM provisioning, maximized I/O throughput, and streamlined network management.
High-Performance SQL Database Clustering Using 766491-B21 HP FLEXFABRIC 10GB 2Port 536FLB FIO Adapter
A financial services firm deploying a Microsoft SQL Server AlwaysOn cluster employs the 766491-B21 adapter’s dual 10 GbE FIO ports and hardware offloads for TCP/IP and iSCSI. The solution achieves sub-millisecond data replication, 20% faster transaction processing, and seamless failover. Outcome: enhanced data availability, superior query performance, and full compliance with regulatory SLAs.
Hybrid Cloud & Disaster Recovery with 766491-B21 HP FLEXFABRIC 10GB 2Port 536FLB FIO Adapter
A retail enterprise replicates critical workloads between on-premises data centers and a private cloud DR site using VXLAN overlays and iSCSI offload on the 766491-B21 adapter. Dual 10 GbE links ensure 10 Gbps encrypted connectivity and zero-downtime failover testing. Outcome: simplified hybrid cloud segmentation, reduced RPO/RTO, and optimized bandwidth utilization.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 766491-B21 |  BB916A |  BB928A |  866464-B21 |  BB927A | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | NAS | SAN | NAS | SAN | SAN |
| Form Factor | Rackmount | Rackmount | Rackmount | Rackmount | Rackmount |
| Bay Count | 12-bay | 24-bay | 24-bay | 12-bay | 12-bay |
| Supported Drive Types | Mixed | SATA HDD / SAS HDD / SATA SSD / NVMe SSD | Mixed | Mixed | SATA HDD / SAS HDD / SATA SSD / NVMe SSD |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
| Max Supported Capacity | 512 TB | 512 TB | 512 TB | 512 TB | 512 TB |
| RAID Support | 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 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / 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 | DDR4 | DDR4 | ECC DDR4 | DDR4 |
| Network Ports | 10GbE | 10GbE | 10GbE | 10GbE | 10GbE |
| LAN Ports | 2 | 2 | 4 | 4 | 2 |
| USB Ports | USB 3.2 | USB 3.0 | USB-C | USB 3.2 | USB 3.0 |
| Expansion Support | Yes | Yes | Yes | Yes | Yes |
| Cooling | Active | Redundant Fan | Redundant Fan | Redundant Fan | Active |
| Power Supply | Redundant | Redundant | Redundant | Redundant | Redundant |
| Power Supply Wattage | 500W | 500W | 500W | 750W | 350W |
| 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 | Yes | No | No | No | No |
| Use Case | Enterprise Data Center | Enterprise Data Center | SMB, Enterprise Data Center, Media Server, Virtualization | Enterprise Data Center | Enterprise Data Center |
| Product Name | 766491-B21 Storage System | BB916A High-Performance SAN Storage System | BB928A | 866464-B21 Enterprise SAN Storage | BB927A Enterprise SAN |
| Height | 3 inches | 5.25 inches | 3 inches | 3.5 inches | 3 inches |
| Width | 17 inches | 17.5 inches | 17 inches | 17.5 inches | 17 inches |
| Depth | 19 inches | 28 inches | 28 inches | 28 inches | 28 inches |
| Weight | 30 lbs | 45 lbs | 55 lbs | 50 lbs | 35 lbs |
Reviews & Ratings
A
Adnan Rafi
4
Installed easily.
S
Sebastian Wolf
5
Reliable performance.
O
Olli Hietala
3
No issues so far.
P
Paul Lewis
4
Satisfied overall.
Questions & Answers
What is the HP FlexFabric 10Gb 2-port 536FLB FIO Adapter (SKU 766491-B21)?
The HP FlexFabric 10Gb 2-port 536FLB FIO Adapter (SKU 766491-B21) is a dual-port converged network adapter that delivers 10Gb Ethernet with FlexFabric I/O and Fibre Channel over Ethernet (FCoE) support.
What are the main features of the HP 536FLB FIO Adapter?
Key features include two 10Gb ports, FlexFabric converged I/O, FCoE support, RDMA offload (RoCE), low latency, and a low-profile mezzanine design.
Which servers are compatible with the HP 766491-B21 adapter?
It is compatible with HPE ProLiant Gen8 and newer servers with FLB mezzanine slots, including DL360, DL380, BL460, BL660 and select Synergy compute modules.
What operating systems does the HP FlexFabric 10Gb adapter support?
Supported OSes include Microsoft Windows Server, VMware ESXi, Red Hat Enterprise Linux, SUSE Linux Enterprise Server and Citrix XenServer.