lsusb
Can't find USB:
echo -1 | sudo tee /sys/module/usbcore/parameters/autosuspend
--OR--
echo Y | sudo tee /sys/module/usbcore/parameters/old_scheme_first
Remove:
echo 1>/sys/bus/usb/devices/usb1/remove
hdparm --command=stop /dev/sda1
hdparm -Y /dev/sda1