+++ Usage: check_drbd [-d ] [-e expect] [-p proc] [-r role] [-o states] [-w states] [-c states] [--debug] Options: -d STRING [default: 0. Example: 0,1,2 ] -p STRING [default: /proc/drbd. Use '-' for stdin] -e STRING [Must be this connected state. Example: Connected] -r STRING [Must be this node state. Example: Primary] -o STRING [Change value to OK. Example: StandAlone] -w STRING [Change value to