We have had a disk data coruption the other day. We fixed that, but when I try to start my oracle DB with I get this message:
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ORACLE instance started.

Total System Global Area 1839236020 bytes
Fixed Size 70580 bytes
Variable Size 480731136 bytes
Database Buffers 1358356480 bytes
Redo Buffers 77824 bytes
Database mounted.
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 1
ORA-08103: object no longer exists
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I have no backup of this DB. Can someone please tell me what can cause those errors and how can I fix it and how can I start my DB. I can mount it , but when I try to open it there is an error.

Thanks in advance.