RAID5 volumes on ARC-1222 not recognized by ESXi

Hey guys,

I am a n00b & I just setup my first official esxi server. I have the latest version of ESXi installed.

I have created a 2TB RAID5 volume out of 3TB using ARC-1222 Raid Controller. When I login to the vSphere Client, to add a datastore from the "configuration" tab, it does not recognize the 2TB volume. Do I need to add a driver? If so, how would I add the driver?

I hope you can help me.

Thanks a lot!