Minimal gateway hardware configuration

[Wojciech Puchar]

> One other question -a bit silly:
> If I use that configuration as the gateway, can it be left on and
> working 24x7? I mean, regarding the _hardware_, how often does it need
> to be powered off: once a day, once a week, ... to prevent hardware
> failures such as HDD crash?

actually disks feel better when running 24/7. other elements too.
stable temperature etc...