host connectivity guide for AIX says:  Adding devices online Whenever devices are added online to the Symmetrix system ordevice channel addresses are changed, you must run the emc_cfgmgrscript to introduce the new devices to the system:1. Change directory to /usr/lpp/EMC/Symmetrix/bin.2. Invoke the shell script emc_cfgmgr.Whenever TimeFinder devices are configured by the host, they areforced to a defined state. To configure all defined SymmetrixTimeFinder devices and set them to an available state, enter:mkbcv -a  honestly i've never used emc_cfgmgr ..cfgmgr has always worked for me.
Are these two commands are different and should be run to rebuild the ODM database and host configuration on AIX ?, Can someone explain what these commands actually do in a symmetrix attached environment ?
Is cfgmgr and emc_cfgmgr same for AIX host in a VMAX attached environment??