766490-B21: HPE FlexFabric 10Gb 2-port 536FLB Adapter
HPE FlexFabric 10Gb 2-port 536FLB Adapter. Listed by HPE as a network adapter for the ProLiant BL460c Gen9. The pairing comes from the vendor QuickSpecs, which also gives the quantity limits and any controller, firmware or slot requirements. Check those rules and the part number suffix before buying a used unit.
Specifications
| Part number | 766490-B21 |
|---|---|
| Brand | HPE |
| Type | Network adapters |
| Speed gbps | 10 |
| Vendor description | HPE FlexFabric 10Gb 2-port 536FLB Adapter |
Fits these models
Works together
How the HPE 766490-B21 connects to servers, storage and the network: 3 ways, with the hardware on each path.
iSCSI and NVMe/TCP over Ethernet
Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.
Switches
HPE Aruba CX 8100 1U fixed switch
HPE Aruba CX 8325-48Y8C 1U rack
HPE Aruba CX 8360-32Y4C 1U rack
HPE Aruba CX 8400 8-slot modular chassis
Storage
HPE Alletra 6000 4U rack
HPE Alletra 9000 4U rack mission-critical array
HPE Alletra Storage MP 2U rack
HPE MSA 1060 2U rack entry SAN
HPE MSA 2060 2U rack
HPE MSA 2062 2U rack hybrid SAN
Optics
R0Q21A HPE MSA 10Gb Short Range iSCSI SFP+ 4-pack Transceivers Gen6
C8R23A HPE MSA 10Gb Short Range iSCSI SFP+ 4-pack Transceivers
SFP-10G-LR-AR Arista 10GBASE-LR SFP+ Optical Transceiver Module
File storage (NFS and SMB)
Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.
Switches
HPE Aruba CX 8100 1U fixed switch
HPE Aruba CX 8325-48Y8C 1U rack
HPE Aruba CX 8360-32Y4C 1U rack
HPE Aruba CX 8400 8-slot modular chassis
Storage
HPE Alletra Storage MP 2U rack
Dell PowerScale A300 4U
Dell PowerScale A3000 4U 4-node chassis
Dell PowerScale F200 1U rack
Dell PowerScale F600 1U rack
Dell PowerScale F900 2U rack
Optics
R0Q21A HPE MSA 10Gb Short Range iSCSI SFP+ 4-pack Transceivers Gen6
C8R23A HPE MSA 10Gb Short Range iSCSI SFP+ 4-pack Transceivers
SFP-10G-LR-AR Arista 10GBASE-LR SFP+ Optical Transceiver Module
Hyperconverged cluster
Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.
HCI nodes
HPE SimpliVity 325 Gen10 Plus v2 1U rack
HPE SimpliVity 380 Gen10 G 2U rack
HPE SimpliVity 325 Gen10 1U rack
HPE SimpliVity 380 Gen10 2U rack
Switches
HPE Aruba CX 8100 1U fixed switch
HPE Aruba CX 8325-48Y8C 1U rack
HPE Aruba CX 8360-32Y4C 1U rack
HPE Aruba CX 8400 8-slot modular chassis
Optics
R0Q21A HPE MSA 10Gb Short Range iSCSI SFP+ 4-pack Transceivers Gen6
C8R23A HPE MSA 10Gb Short Range iSCSI SFP+ 4-pack Transceivers
SFP-10G-LR-AR Arista 10GBASE-LR SFP+ Optical Transceiver Module
Plan and size it
- Draw this setup in the topology planner mrplanb.com
- Add up rack power and space rack-density.com
- iSCSI explained mrplanb.com
- Virtualization storage Ledger: scored storage platforms mrplanb.com
- Network monitoring tools compared mrplanb.com
- HPE SPOCK (HPE storage compatibility) hpe.com
Check compatibility with HPE
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that HPE has tested with the HPE 766490-B21.
- Compatibility HPE SPOCK (storage, SAN and host compatibility)
- Part lookup HPE PartSurfer (spare and option part numbers)
- Support HPE Support Center
Buying or selling 766490-B21?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- HPE ProLiant BL460c Gen9 Server Blade QuickSpecs, checked 2026-10-28
- HPE ProLiant BL660c Gen9 Server Blade QuickSpecs, checked 2026-10-28