A bash script that checks all connected disks with Smartmontools short test.

disk-check.sh

#!/bin/bash
#
# Checks all connected disks for errors with smartmontools

# Variables
###########
date=null # time for logs
diskcount=$(lsblk -l | grep -c 'disk') # counts all connected disks
disklist=$(lsblk -l | grep 'disk' | grep -oh "[[:alpha:]]*sd[[:alpha:]]*") # create a list of all connected disks https://stackoverflow.com/a/15997066

## Arrays
#########
declare -A pkgman
pgkman[apt]=$(which apt)
pkgman[yum]=$(which yum)
pkgman[pacman]=$(which pacman)

# Functions
###########
# Checks if a test is currently running on a drive through smartctl --capabilities
test_progress() {
  smartctl -c /dev/"$disk" | grep -A 1 "Self-test routine in progress"
}

# Outputs to sdout and log file
append_log(){
  tee -a log.txt
}
# Function for SIGINT trap; see below
interrupt() {
  smartctl -X /dev/"$disk"
  exit
}

# Script
########

# Install smartmontools if not installed
for i in "${!pkgman[@]}" # takes index of array
do
  # apt (debian, ubuntu, mint...)
  if which "${pgkman[$i]}"; then # checks if the value (output of which) is not null
    
    if [ "$i" = apt ]; then # if the current array index (type of package manager) is <some-package-manager>
      if dpkg -s smartmontools | grep -q "install ok installed"; then
        echo -e "\nSmartmontools already installed"
      else
        echo -e "\nInstalling Smartmontools"
        apt update
        apt install smartmontools
      fi
    fi

    # rpm/yum (redhat, opensuse, fedora, centos...)
    if [ "$i" = yum ]; then
      if yum list installed | grep -q "smartmontools"; then
        echo -e "\nSmartmontools already installed"
      else
        echo -e "\nInstalling Smartmontools"
        yum update
        yum install smartmontools
      fi
    fi

    # pacman (arch, manjaro...)
    if [ "$i" = pacman ]; then
      if pacman -Qs smartmontools > /dev/null; then
        echo -e "\nSmartmontools already installed"
      else
        echo -e "\nInstalling Smartmontools"
        pacman -Syy
        pacman -S smartmontools
      fi
    fi
  fi
done

# Creates or wipes log file
echo > log.txt

# Outputs number of connected disks
echo -e "\n\nNumber of connected disks:" | append_log
echo "$diskcount" | append_log

# Outputs names of connected disks
echo -e "\nAll connected disks:" | append_log
echo "$disklist"

read -n 1 -s -r -p "Press any key to commence testing"

# Cancels ongoing test when 'Ctrl-C' is pressed before exiting
trap interrupt SIGINT
# Iterate over every disk
for disk in $disklist
do
  echo -e "\n#################### DISK $disk START ####################" | append_log
  # Run a short offline test on disk
  smartctl -t short /dev/"$disk" | grep -A 5000 "==="
  
  # Adds timestamp to log
  date=$(date)
  echo -e "\nTest started $date\n" | append_log

  while true
  do	
    sleep 15s
    if test_progress # cant tee here or it hangs when the test is complete
    then
      test_progress >> log.txt
      smartctl -a /dev/"$disk" >> /dev/null # should keep the drives awake https://superuser.com/a/1294266
    else
      # Writes all test results to log file with a timestamp
      # latest result is the first one; num 1
      date=$(date)
      echo -e "\nTest completed at $date\n" | append_log
      smartctl -l selftest /dev/"$disk" | grep -A 5000 "===" | append_log
      echo "******************** DISK $disk END ********************" | append_log
      break
    fi
  done
done

echo -e "\n\n##################### TESTING FINISHED #############################" | append_log