[mk01]

btw: there is another issue with allowing hdparm to set spin downs. for some SD/USB sticks it thinks it is rotational disks and tries to set spin down. this later (minutes / hours / days) leeds to freeze / or sd/usb data corruption.

so for beta2 is solved as:
1) nohdparm will be part of cmdline.txt
2) spindown setup is part of usbmount (/etc/usbmount/usbmount.conf) - it can be enabled/disabled and even set timing
3) before usbmount tries to set spin down, it double checks if the disk rotational and even if reported like that, it uses hdparm to request APM capabilities first (before try to set spin down)

hopefully this will be ok.