Can't start my DB

[terry71]

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:
-------------------------------------------
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
------------------------------------------------------
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.

[nagarjuna]

Your data dictionary got corrupted. I have no idea of recovering it without a proper backup. Lets wait for other guru's answers

[terry71]

If data dictionary is corrupted, can my data be saved in any way?

Thanks in advance

[julian]

Shutdown with abort, then clean up all OS structures used by the instance: semaphores etc.

Startup then. If it doesn't help and no backup is present, contact Oracle support.

[prakashs43]

This is something serious . log an iTAR in metalink from Oracle Support .

[jrpm]

You said you had disk corruption. Do you know which file was corrupted?

Also, were you running in archivelog mode?

If you were not running in archivelog mode, I don't think there is anything you can do if you have no backup.

Given archivelog mode.

If it was not the system, there is some hope.
If it wasn't the system tablespace/datafile the following sequence might work.

Crash the database (shutdown abort and/or power down the server without doing a shutdown.)

do a startup mount of the database.
vary the datafile that was corrupted offline
alter the database open.

You might have to do a 'startup nomount'. It depends on your release, platform, config settings, which datafile was corrupted and what cheek your tongue is in.