Backup software

Hello,

I have the challenge to make online backups with the least budget possible. So I have checked out some known backup SW solutions. For example, ultrabac, arcserve, veritas.

But before any decision, I would like to have more opinions about what it means to backup online and in-use files:

1. office open files (word, excel, etc.)
2. exchange db
3. sql 7/2000 db
4. disaster recovery

and the most important:
5. Oracle 8 db

Your comments and suggestions will be appreciated,