How to solve ORA-011033: ORACLE initialization or shutdown in progress

oracle

I have followed link to solve the problem.

When it is giving ORA-00600: internal error code, arguments: [kcratr1_lostwrt] then I am using: 

SQL> startup mount

the above line should return ORACLE Instance started
but it is showing "cannot start already-running Oracle - shut it down first".

Best Answer

ORA-00600 is Oracle's generic message for un-handled internal exceptions i.e. bugs. Usually they require us to raise an SR with Oracle Support. This can be a problem for sites who are using Oracle without a support contract. In that situation we are thrown on the resources of the internet.

The problem you are experiencing is due to a corrupted block. The top result in Google offers a simple workaround: find out more. 

SQL> shutdown immediate;
SQL> startup mount;
SQL> recover database;
SQL> alter database open;

(Of course, this is only a solution if you are running in archivelog mode, and so can recover the lost block).

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