How do I verify RAID installed?

How do I verify RAID 1 hardware is installed? It's a new server, running cpanel and RHE3. When I check the system information in cpanel, it doesnt mention raid. I read somewhere that the message logs will have references to twe0 but that is not in our logs. There were so many things missing from our server, that I'm in the position of questioning the rest.

Is there a command I can use to verify it?

 

 

 

 

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