--- conf/services/zz-disk_space.conf	2016-03-30 17:32:33.000000000 -0400
+++ conf/services/zz-disk_space.conf	2016-11-08 20:54:04.000000000 -0500
@@ -31,6 +31,8 @@
 # of filesystem disk usage.  For example, the following are the defaults
 # for Linux OS:
 # $df_options = "-h -l -x tmpfs"
+# Use -P otherwise the inodes addition cause disk full array to be wrong
+$df_options = "-PH"
 # $disk_cmd = "df $df_options"
 
 # Uncomment this to add -l to df command. Only see local disks.
@@ -44,6 +46,7 @@
 # Regular expression to exclude directories from disk full warnings.
 # Expression is achored at the beginning with ^, but not at the end.
 #$diskfull_exclude_dirs = /run/media
+$diskfull_exclude_dirs = /dev
 
 ########################################################
 # This was written and is maintained by: