"Unable to read" error for mount point

[grgizem]

check-disk-usage.rb fails on ext4 mount point,

CheckDisk WARNING: /data Unable to read.

[eheydrick]

That means sys-filesystem is unable to stat the filesystem. Can you run stat -f /data as the user the sensu check runs as (probably the sensu user) and see if it can successfully stat the filesystem. If that works run this simple test of sys-filesystem using the ruby you are executing the check with:

#!/usr/bin/env ruby

require 'sys/filesystem'
include Sys

stat = Filesystem.stat("/data")
puts "Bytes Free: " + stat.bytes_free.to_s

If that works then something else is going on.

[grgizem]

unfortunately, no problem on running this test with sensu user