Script that periodically monitor system disks counters using sar utility, samples are pushed to a Graphite's carbon-cache instance.

graphite_sar_monitor_system_devices_withpush.sh

#!/bin/bash
SAMPLING_INTERVAL=5 
GRAPHITE_SERVER="127.0.0.1"
GRAPHITE_CARBON_PAINTEXT_PORT=2003
LC_ALL=C \
  sar -d $SAMPLING_INTERVAL | \
    gawk -vhostname="$(hostname)"  '{
      if (NF == 10 && $2 != "DEV") {
        timestamp = systime();
        printf("%s.%s.rd_sec %s %d\n", hostname, $2, $4, timestamp);
        printf("%s.%s.wr_sec %s %d\n", hostname, $2, $5, timestamp);
        printf("%s.%s.await %s %d\n", hostname, $2, $8, timestamp);
        printf("%s.%s.util %s %d\n", hostname, $2, $10, timestamp);
      }
    }' | \
    nc ${GRAPHITE_SERVER} ${GRAPHITE_CARBON_PAINTEXT_PORT}