to start the box it is enough delete recorded files form \hdd\media. if there is no space on hdd epg can't work too. )
i have no another problems.
to prevent the crash i have found a simple solution, i have deleted (or renamed), the folder for recording (\hdd\media) and recording is not starting now.
but actually it is not a good idea to mount and point a recording path to the flash memory by default