External drive keeps spinning on RP1

I tried to plug an external drive on my RP1 but it keeps spinning.
Here is my config.txt file where I put the line “max_usb_current=1” as I did on my RPI2 where the HD is detected without any problem.

arm_freq=850
core_freq=375
max_usb_current=1
gpu_mem_256=112
gpu_mem_512=144
hdmi_ignore_cec_init=1
disable_overscan=1
start_x=1
disable_splash=1
dtoverlay=lirc-
rpi:gpio_out_pin=17,gpio_in_pin=18

Anything I am missinh here?

Thank you for your help.

I think I read somewhere that the original Pi1 (not B+) it would not support that setting

you need a powered usb hub for rpi 1 if the drive is powered by usb