hi ,

thanks for the answer.

but my qusetion in details:
1. at 10 am from crontab
(1a. alter database backup controlfile to trace as ' /path/'
(1b alter database begin backup

at 10.30 am - backup begin through veritas server.
at 11.30 am ---backup end through veritas server.
2. at 12.10 pm from crontab
(2a. alter database end backup).

in this CASE i should have arhives atleast before 10 am --- till 12.10 pm + atleast 2 archive after end backup (12.10 pm)

BUT in this case TAPES will be having archives till-11.30 am , SO if i am restoring the backup to some other servers it is of no gud.

1)NOW i want to know how i can bring the DB UP?
2) I should create control file before begin backup or after end backup?
( As far my understanding i should create it before begin backup ( as SCN detail will be old one in control file) plz correct if i am wrong.