Method of checking disk health
badblocks -v /dev/md126 >> /opt/badblocks.txt
smartctl -H /dev/sda
smartctl -H /dev/sdb
smartctl -H /dev/md126
smartctl -C -t short /dev/sda
smartctl -C -t short /dev/sdb
smartctl -C -t short /dev/md126
smartctl -A /dev/sda
smartctl -A /dev/sdb
smartctl -A /dev/md126
smartctl -l selftest /dev/sda
smartctl -l selftest /dev/sdb
smartctl -l error /dev/sda
smartctl -l error /dev/sdb