That Microserver did not ship with a standard "P" series Smart array controller, which is what the driver files you have downloaded are for. It uses a chipset SATA RAID controller or 'fake RAID' as many refer to it. There was a RAID driver available for specific OS releases.
Start here http://h20566.www2.hpe.com/hpsc/swd/public/readIndex?sp4ts.oid=6525483&lang=en&cc=us
Look for the AMD SB7xx/SB8xx SATA RAID Driver