get_hdd_temp.sh

#!/bin/sh

# Display current temperature of all SMART-enabled drives

# We need a list of the SMART-enabled drives on the system. Choose one of these
# three methods to provide the list. Comment out the two unused sections of code.

# 1. A string constant; just key in the devices you want to report on here:
#drives="da1 da2 da3 da4 da5 da6 da7 da8 ada0"

# 2. A systcl-based technique suggested on the FreeNAS forum:
#drives=$(for drive in $(sysctl -n kern.disks); do \
#if [ "$(/usr/local/sbin/smartctl -i /dev/${drive} | grep "SMART support is: Enabled" | awk '{print $3}')" ]
#then printf ${drive}" "; fi done | awk '{for (i=NF; i!=0 ; i--) print $i }')

# 3. A smartctl-based function:
get_smart_drives()
{
  gs_drives=$(/usr/local/sbin/smartctl --scan | grep "dev" | awk '{print $1}' | sed -e 's/\/dev\///' | tr '\n' ' ')

  gs_smartdrives=""

  for gs_drive in $gs_drives; do
    gs_smart_flag=$(/usr/local/sbin/smartctl -i /dev/"$gs_drive" | grep "SMART support is: Enabled" | awk '{print $4}')
    if [ "$gs_smart_flag" = "Enabled" ]; then
      gs_smartdrives=$gs_smartdrives" "${gs_drive}
    fi
  done

  eval "$1=\$gs_smartdrives"
}

drives=""
get_smart_drives drives

# end of method 3.

#############################
# CPU temperatures:
#############################

cores=$(sysctl -a | grep "hw.ncpu" | awk '{print $2}')
printf "=== CPU (%s) ===\n" "${cores}"
cores=$((cores - 1))

for core in $(seq 0 $cores); do
  temp="$(sysctl -a | grep "cpu.${core}.temp" | cut -c24-25 | tr -d "\n")"
  if [ "$temp" -lt 0 ]; then
    temp="--N/A--"
  else
    temp="${temp}C"
  fi
  printf "CPU %s: %4s\n" "$core" "$temp"
done

echo ""

#############################
# Drive temperatures:
#############################

echo "=== DRIVES ==="

for drive in $drives; do
  serial=$(/usr/local/sbin/smartctl -i /dev/"${drive}" | grep "Serial Number" | awk '{print $3}')
  temp=$(/usr/local/sbin/smartctl -A /dev/"${drive}" | grep "194 Temperature" | awk '{print $10}')
  if [ -z "$temp" ]; then
    temp=$(/usr/local/sbin/smartctl -A /dev/"${drive}" | grep "190 Airflow_Temperature" | awk '{print $10}')
  fi
  brand=$(/usr/local/sbin/smartctl -i /dev/"${drive}" | grep "Model Family" | awk '{print $3, $4, $5}')
  if [ -z "$brand" ]; then
    brand=$(/usr/local/sbin/smartctl -i /dev/"${drive}" | grep "Device Model" | awk '{print $3, $4, $5}')
  fi
  printf "%5.5s: %3.3sC %s %s\n" "$drive" "$temp" "$brand" "$serial" 
done