Intel(R) ESRT2 has support for the Intel(R) C600 chipset on both AHCI Capable SATA Controller and SATA/SAS Capable Controllers. ESRT2 supported operating systems are Red Hat Enterprise Linux and SUSE Linux Enterprise Server. According to the page you reference, for CentOS* 6.x we have only tested under a basic installation scenario. Intel does not provide technical support for CentOS* 6.x. You should contact the related open source community for support.
Currently we only support RSTe under Windows* operating systems.
Because of this we can't fully answer your questions.