#!/bin/sh
# 
# A simple script to detect damaged storage drives on Linux systems.
# (c) 2015-2022 Hosco , GNU GPL v2 or v3
# 

LANG=C
app="BadDrive"
ver="1.0"
system=$(uname -o)

{ printf "%c" "." > /$$.txt && rm /$$.txt ; } 2>/dev/null || \
{ printf "\nYou must have root privileges to run BadDrive.\n\n" && exit 10 ; } ;
printf "%s" "$system" | grep -qsE "Linux|ESX" || \
{ printf "%s\n" "$app only runs on Linux based systems." && exit 11 ; } 

errors=$(dmesg | grep -oE "\[sd[a-z]{1,}\].*(FAILED|Error).*$|\
(naa\.|eui\.|t10\.|SCSI disk).*(FAILED|failed|[Ee]rror|[Ii]naccessible).*(Invalid sense data|I.O error)" \
| sed 's/tag#[0-9]\{1,\} //g' | sort | uniq) ;
drives=$(printf "$errors" | grep -oE "sd[a-z]{1,}|(naa\.|eui\.|t10\.|SCSI disk)[0-9a-z]{1,}" | sort | uniq ) 

printf "%c\n" ;
printf "%s\n" "$app $ver, by Hosco Recuperação de Dados" ;
sleep 0.5 ; 
printf "%s\n" "It detects damaged drives on Linux systems." ;
sleep 1 ;
printf "\n%s\n" "Searching for failing storage drives..." ;
sleep 1 ;

[ -z "$errors" ] && printf "No damaged drives were found.\n\n" \
&& exit ;

printf "Following damaged device(s) were found:\n\n" ;

if printf "%s" "$system" | grep -qs 'Linux' ;
then
  for i in $drives ; 
  do 
    { [ ! -b "/dev/$i" ] 2>/dev/null && printf "%s %s" "$i:" "(no more details about this drive)" ; } || \
	printf "%s" "`lsblk -o type -d /dev/$i | sed '/TYPE/d'` $i: `lsblk -o vendor,model -d /dev/$i | \
	  sed '/VENDOR\|MODEL/d'`" | sed 's/ \{2,\}/ /' ;
	printf "%c\n"
  done ;
printf "\nIt is strongly advised to keep drive(s)" ;
printf "\npowered off for prevention of data loss.\n\n"
fi

if printf "%s" "$system" | grep -qsE "ESX|VMware" ;
then
  for i in $drives ; 
  do 
    { [ ! -e "/dev/disks/$i" ] 2>/dev/null && printf "%s %s\n" "$i:" "(seems absent)" ; } || \
        printf "%s\n" "$i"
  done ;
printf "\nIt is strongly advised to keep drive(s)" ;
printf "\npowered off for prevention of data loss.\n\n"
fi

exit