Many disk tools need the sg modules. Here is an advisory and explanation written for RHEL 7.1 but applicable to any distribution
Advisory: Red Hat Enterprise Linux 7.1 - HP ProLiant Servers Loading HP Smart Storage Administrator (HPSSA), HP Smart Array Command Line Utility (HPSSACLI), or HP Smart Array Firmware Flash Utilities May Not Recognize HP Smart Array Controllers
http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c04708948