You've posted several threads with about the same questions, you should keep following them instead of creating new ones, now to answer your questions:
- If you havent configured any storage manager then onbar will not do anything.
- If you dont have a default printer configured then ism_startup will warn you that the bootstrap could not be printed, its just a warning, not an error.
- You configure ISM by adding devices (ism_add -device ....), labeling the device (ism_op -label <device> ......) and finally mounting the device (ism_op -mount <device>......)
- The devices can point to tape, files, etc. so it is possible to backup your database to the local disk providing you have enough space.
To get a better understanding of how ism works you can refer to the informix manuals.