9. Miscellaneous Errors
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux Error: 2: No such file or directory
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This error happens when you reboot and try to login. You will get lots of errors when the database instance is not mounted/started automatically.
Solution:
Check /etc/oratab and make sure that *:/opt/oracle/OraHome1 and ordb:/opt/oracle/OraHome1 are set to "Y" (YES).
Try to initialize the database: $ORACLE_HOME/bin/dbstart.
ERROR:
No start entry for SID * at /opt/oracle/OraHome1 in /etc/oratab
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This might be caused by a bug in the dbstart script which searches for the sid file in the wrong place.
Solution:
cp $ORACLE_BASE/admin/$ORACLE_SID/pfile/init_*.ora \
$ORACLE_HOME/dbs/init$ORACLE_SID.ora
As user oracle:
$ sqlplus
SQL> create pfile from spfile;
SQL> exit
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Run the dbstart script: $ORACLE_HOME/bin/dbstart.
