HBAs (Host Bus Adapter) are just Nic cards for SAN that connects servers and storage to the SAN network.
There are three types of HBAs:-
A. Fibre channe HBAs :-
- It only supports native FC(fibre channel) traffic.
- It supports 1/2/4/8/16 Gbps.
B. iSCSI HBAs :-
- It offloads CPU from iSCSI read and writes.
- It is a normal Ethernet interface
- 1/10 Gbps supported
C. CNA (Converged Network Adapter) :-
- Used in FCOE ( Fibre channel over ethernet)
- It carries both ethernet and storage traffic together.