hdsentinel script for use with proxmox

HDSentinelScript.md

Step 1: download the free Linux 64-bit console version of HDSentinel; extract the single binary file, save it as /root/HDSentinel and make it executable Step 2: Add the following script: /root/hdsentinel.sh

#!/bin/bash
# cron script to warn on HDD health status changes

MinHealth=60
MaxTemp=55
StatusCmd="/root/HDSentinel -solid"
StatusCmdFull="/root/HDSentinel"
StatusFile=/root/HDSentinel.status
Warnings=""

declare -A LastHealthArray=()
if [ -f ${StatusFile} ]; then
  while read device temperature health pon_hours model sn size; do
    LastHealthArray[${device}]=${health}
  done < ${StatusFile}
fi

${StatusCmd} > ${StatusFile}
sync

declare -A HealthArray=()
while read device temperature health pon_hours model sn size; do
  HealthArray[${device}]=${health}
  if [[ -v "LastHealthArray[${device}]" ]]; then
    [ "${LastHealthArray[${device}]}" -eq "${health}" ] ||
      Warnings+="Device ${device} changed health status from ${LastHealthArray[${device}]} to ${health}\n"
  else
    Warnings+="Found new device: ${device}\n"
  fi
  (( ${health} < ${MinHealth} )) &&
    Warnings+="Device ${device} health = ${health} < ${MinHealth}\n"
  (( ${temperature} > ${MaxTemp} )) &&
    Warnings+="Device ${device} temperature = ${temperature} > ${MaxTemp}\n"
done < ${StatusFile}

for device in "${!LastHealthArray[@]}"
do
  [[ -v "HealthArray[${device}]" ]] ||
    Warnings+="Device ${device} missing\n"
done

if ! [ -z "${Warnings}" ]; then
  echo "----- WARNINGS FOUND -----"
  echo -e "${Warnings}"
  $StatusCmdFull
fi

Step 3: run the above script periodically, eg. hourly. Note This assumes you have configured your Linux/Proxmox system to forward emails meant for the system root to your own email address. Doing so is dependent on your own homelab setup and beyond the scope of this post. ln -s /root/hdsentinel.sh /etc/cron.hourly/hdsentinel