Host Bus Adapter

What Does Host Bus Adapter Mean?

A host bus adapter (HBA) is a device that connects multiple peripheral devices with a computer. It works as an expansion card that is plugged into the computer to enable connection between the peripheral devices and computer.


A host bust adapter is also known as a host adapter or host controller.

Techopedia Explains Host Bus Adapter

A host adapter enables connectivity of peripheral units to a computer and provides input/output support and processing. It also has the ability to perform some low-level processing operations, which helps reduce the load on the primary processor. Each computer can have multiple host bust adapters connected to it at the same time. Common examples of host adapters are Integrated Drive Electronics (IDE) adapters, Serial Advanced Technology Attachments (SATA), Small Computer System Interface (SCSI) and Firewire. Moreover, HBAs also include devices that have the capability to support Ethernet and Fire Channel.


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Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…