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What is the difference between RAID Controller and HBA

vpradeep
By vpradeep
in Storage Devices
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I don't know the details but my understanding is that the general difference between a HBA or Host Bus Adapter and a RAID controller is that a RAID controller provides the functions of, well, RAID. Typically 0/1/5/6/10. While an HBA does none of those. It supports what is effectively JBOD. Just a Bunch Of Disks. Where it provides nothing more than more SATA ports to plug drives into.

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HBA is just a bunch of ports no different to the ports on a motherboard. You can get SATA HBAs and SAS HBAs but functionally they are all the same, including motherboard SATA ports. You can get SAS to SATA cables as well.

 

RAID controller creates virtual disks/volumes and presents those to the system to use, as far as the system can tell it's a normal single disk device.

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