My customer want to use 1026T-6RF+ , he will use SSD, SATA3 HDD and SAS2 HDD to the built-in LSI 2108 controller, does LSI 2108 controller support SATA 3 to run at 6Gb/s (not 3Gb/s) ?
Yes, it does support SATA3 hard drive at 6Gbps speed. Here are tested HDDs for your reference.
http://www.supermicro.com.tw/support/resources/HDD/display.cfm?Category=SS&sz=2.5&ctrl=27&id=23C997AA35463F8EC9ED13A9AA02A251