#!/bin/bash
#
#Dave Byrne
#LSI Hardware RAID S.M.A.R.T Check
#

#Where is storcli?
storclibin="/opt/MegaRAID/storcli/storcli64"

#Check if storcli actually exists, echo and exit warning if it isnt
if ! [ -e "$storclibin" ]
then
  echo "WARNING - StorCli Not Found"
  exit 1
fi

#Get number of underlying physical disks from storcli
underlyingdisks=`$storclibin /c0 show|grep "Physical Drives"|awk '{ print $4}'`

#Loop to grab the smart health result from all physical disks
counter=0
while [ $counter -lt $underlyingdisks ]; do
  #echo counter at $counter
  smartctl -d sat+megaraid,$counter -a /dev/sda|grep "SMART overall-health self-assessment test result" >> /usr/results.txt
  let counter=counter+1
done

#Analyse results and start giving exit codes

if grep -q FAILED "/usr/results.txt";
then
    #failed string found, time to work out what disk it was
    line=`awk '/FAILED/{ print NR; exit }' /usr/results.txt`
    #subtract 1 from line number as disks start at 0
    let line=line-1
    diskinfo=`smartctl -d sat+megaraid,$line -a /dev/sda|grep -E 'Device Model|Serial Number'`
    printf "CRITICAL - Device ID #$line FAILURE Imminent\nDISK INFO: \n$diskinfo \n"
    rm -f /usr/results.txt
    exit 2
else
    #failed string not found, echo and exit ok
    echo "OK - All array disks healthy"
    rm -f /usr/results.txt
    exit 0
fi