عاجل كيف اعمل نسخة احتياطية لبياناتي

We have a server runs windows 2003 server and contains 4

HD, each Hd contains one partition.
on that server we have oracle server holds database working in
archivelog mode. that server work from 8:00 am to 8:00 pm each day
including friday.
that database contains the following Tablespaces:
- system (on C:\ Drive)
- Undo (on D:\ Drive)
- temp (on D:\ Drive)
- users (on E:\ Drive)
- indx (on F:\ Drive)
- archive (on E:\ Drive)
- stock (on E:\ Drive)
- accounts (on E:\ Drive)
and contains 4 control files seperated among the 4 disks and 4 log
groups each group contains 2 members (on C:\ and d:\ respectively).
the Archive destnation is a folder of F:\

First : please put a plan to backup the database without using RMAN

everyweek
Second : explain how to recover database in 4 cases :
a- The first disk (corresponds to C:\) is lost
b- the second disk (corresponds to d:\) is lost
c- the forth disk (corresponds to e:\) is lost
d- the tablespace stock is dropped by mistake on "2008-09-11:18:05:04"