> If you want a durable write; you should not disable journalling and use safe mode / getlasterror with the desired writeconcern setting
Sure. Which is the default approach of almost all of the drivers.
Not quite true; historically most (i.e. official) defaulted to safe=false.
Also safe=true only makes sure the server acknowledged your write; writeconcern allows you to wait for it to be written to the journal or more.
Also, journalling is not controllable via client drivers, only via startup flags / config options.
If you want a durable write; you should not disable journalling and use safe mode / getlasterror with the desired writeconcern setting - http://docs.mongodb.org/manual/reference/command/getLastErro...