Problem For Ora9i Administrator

al salamoalaykom

could you please see this administration problem, and tell me how to solve it

the problem is :



At the end of the day one Monday, DB administrator tried to run an application working against Oracle 9i database, he got following error message:
ORA-01115: IO error reading block from file 13 (block #66771)
ORA-01110: Data file 13:'/ndxs/oradata/Prod/df001.dbf'

Where df001.dbf is one of the Index tablespace files.

Q1: what do these messages indicate and what are the possible causes of this problem.

Q2: what actions you will do trying to solve this problem, given that the database is running in archive mode.

Q3: To enable fast failover when a production outage occurs, oracle has a feature called DATA GUARD.
3-1 Describe briefly how can you use this feature and what are its benefits.
3-2 Make a list of the steps you should do to run this feature on your database.


thank you anyway