The command would be "staf OlioDB0 ping ping" from a windows command prompt.
You can look in the task manager for STAFproc.exe.
If it isn't running, you can log into your DS2DB0 via ssh and execute the following two commands: (Note the period and space)
. /usr/local/staf/STAFEnv.sh
/usr/local/staf/bin/STAFProc