Monitor hardisk on dell server with small bash script

This is a my small scirpt (run it as cron),it will send to zabbix status Ok or Fail of your physical disk on Dell server :

Dell.sh

#!/bin/bash
#Writed by nhanns[@]vng[dot]com[dot]vn -nhannguyen[@]0937686468[dot]com
#skype: nguyen_si_nhan
#Program'll send alert status to zabbix

#Check number controller
[ ! -f "/opt/dell/srvadmin/bin/omreport" ] && { echo "omreport:file not found-please install hardware monitor for Dell"; exit 1; }
Controller=0
/opt/dell/srvadmin/bin/omreport storage controller >/tmp/controller.tmp
_file1="/tmp/controller.tmp"
#check empty file
if [ ! -s "$_file1" ]
then
echo "Can not run on this server"
exit 2
fi
while read line; do
    Bool=0
    if [[ "$line" = ID* ]]; then
        Bool=1
        (( Controller++ ))
        # do something with  ?
    fi
done < /tmp/controller.tmp

#Export to file status of physical disk
i=0
rm -f /tmp/dellstatus.log;
while (( i < Controller )) ; do
/opt/dell/srvadmin/bin/omreport storage pdisk controller=$i >> /tmp/dellstatus.log
  (( ++i ))
done

_file2="/tmp/dellstatus.log"
if [ ! -s "$_file2" ]
then
echo "Can not run on this server"
exit 3
fi

Failstatus=0
statusOK=0
while read line; do
    BoolSt=0
BoolOk=0
   if [[ "$line" = Status* ]]; then
        BoolSt=1
       (( Failstatus++ ))
       # do something with ... ?
   fi
  if [[ "$line" = *Ok* ]]; then
        BoolOk=1
       (( statusOk++ ))
       # do something with  ...?
      fi
          if [[ "$line" = *Non-Critical* ]]; then
                BoolOk=1
                (( statusOk++ ))
                # do something with  ...?
           fi


done < /tmp/dellstatus.log
#echo "There were Failstatus $Failstatus Status ."

#echo "There were  statusOk $statusOk Ok ."

# Problem = ` $Failstatus - $statusOk `
#let Problem=$Failstatus - $statusOk
#echo 'There are'
#echo `expr  $Failstatus - $statusOk `
/opt/zabbix/bin/zabbix_sender -c /opt/check.conf -k hddstatus -o `expr  $Failstatus - $statusOk`