yum install smart\*
chkconfig smartd on
service smartd restart
tail -100 /var/log/messages
smartctl -a /dev/sdb | less -S
smartctl -s on -o on -S on /dev/sda
badblocks -wsv /dev/sda
smartctl -s on -o on -S on /dev/sda
smartctl -a /dev/sda | less -S
smartctl -P show /dev/sda | less -S
smartctl --test=long /dev/sda