[Koha] Database in specific directory & backup

hi to all. two questions: 1. is it possible to save the koha database in a specific directory, like in home directory in a second hard drive? 2. for making regular backups is it better to have only one partition in an hard drive (system + data) and create an image file of the hard disk and save it in other storage devices instead of having an hard disk for system and another for data? (i noticed that config files are in different places in system partition) tia andrea furin --