@MG,
Running kernel 3.12.0-kirkwood-tld-5, if the HDD is mounted at sda1, what's your output of
Running kernel 3.12.0-kirkwood-tld-5, if the HDD is mounted at sda1, what's your output of
hdparm -C /dev/sda udevadm info --query=all --name=/dev/sda1 mount