It is perfectly correct output, even with that "unknown" for storage interface (I have the same). Unlike on-board ICH10 ports (wich can attach only sata-disks), your raid-controller can attach both sata- and sas-drives (even mix both types together in one array). Moreover, those drives are completely hidden from system by raid-layer. All "esxcfg" can see is one raid-array, but it can not query individual disks to find what interface they use. Only proprietary vendor-tool can do it (i.e. StorCLI, MegaCLI, SMIS-provider)...