T105 support "SAS6/IR Adapter". SAS6/IR have limited RAID functionality. You can refer below link for more details on this controller [URL] 
Thanks for helping on my other thread about my t310. I also have a pe t105. Will this upgrade to sas drives ? I have 3x2tb sas drives as well as 7x900gb drives If so what controllers etc do i need to buy please. Thanks  
Sas drives in a t105