add a new memory option for storage nodes
refactor setting the path to disks, cause the output of list systemproperties changed und got caught with not beeing DRY
using the new function. not optimal. but defer to using something decribed in http://www.linuxjournal.com/content/return-values-bash-functions
use bash so source works, include the functions and config values, use 6 machines, attach a second disk to 3 of them, output the resulting cluster
delete all 6 machines