OK, Thanks...

The DB is allready running in Standby/readonly mod, sould i find the old standby file and put it in the command ? Or do i have to create a new one ...

Other question... is it possible to restore the standby DB (from a fullbackup) when i take it offline ? --> when i take DB after restore online... will it be as standby /readonly like before ?

Thanks for your help

Regards, Dominic