What is a Raid Card for?

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Mason Chai

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Apr 11, 2016
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I am trying to build a home NAS so i am now gathering the knowledge I need to build one but I can 't seems to find any information that is simple enough for me to understand what a raid card is. Also I have my eye on the Asrock Rack C2750D4I. It seems to have these different storage controller what does that mean? does it have have anything to do with RAID card?
 
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A raid card is a storage controller which has it's own dedicated hardware for creating raid arrays and it has a microprocessor for it's own data calculations (here's an example. Most storage controllers, with raid support, that are integrated on motherboard are so called software raid type. They don't have the actual hardware and the main cpu of the system does all the data processing. Dedicated raid cards with their own processor are a lot more powerfull, but are also usually expensive.

Those storage controllers on that Asrock board are there to support more SATA ports (you would only have 6 SATA ports without the additional controllers, which add another 6 to make it 12 in total).

For home NAS you are propably fine without any...
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Samat

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Aug 21, 2006
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A raid card is a storage controller which has it's own dedicated hardware for creating raid arrays and it has a microprocessor for it's own data calculations (here's an example. Most storage controllers, with raid support, that are integrated on motherboard are so called software raid type. They don't have the actual hardware and the main cpu of the system does all the data processing. Dedicated raid cards with their own processor are a lot more powerfull, but are also usually expensive.

Those storage controllers on that Asrock board are there to support more SATA ports (you would only have 6 SATA ports without the additional controllers, which add another 6 to make it 12 in total).

For home NAS you are propably fine without any dedicated hardware raid card. You can easily setup a NAS with multiple harddrives with raid type functionality using Free NAS for example.
 
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