When the oracle database is started in the nomount state, which file needs to be called?

The file called to start the Oracle database to the NOMOUNT state is initsid.ora. Edit this file to modify the following parameters: DB_NAME (database name), DB_CREATE (prevent automatic creation), DB_RECOVERY_FILE_DEST (recovery log directory), DB_RECOVERY_FILE_DEST_SIZE (recovery log size), and then use the command "STARTUP NOMOUNT" to start the database.

File called when the Oracle database starts to NOMOUNT state

When the Oracle database starts, you can call a specific file file to specify the database to start in the NOMOUNT state. The file is:

<code>$ORACLE_HOME/dbs/initsid.ora</code>

where:

• $ORACLE_HOME is the path to the Oracle home directory.
• sid is the SID of the database to start.

Detailed instructions

• To start the Oracle database to the NOMOUNT state, please perform the following steps:

  1. Enter the Oracle user's home directory: cd $ORACLE_HOME.
  2. Edit the initsid.ora file using the following command: vi $ORACLE_HOME/dbs/initsid.ora.
  3. Find the SID of the database to be started in the /etc/oratab file. For example: orcl:N:/u01/app/oracle/oradata/orcl.
  4. The DB_NAME parameter is found in the initsid.ora file. Change the value of this parameter to the database name corresponding to the SID in the /etc/oratab file. For example: DB_NAME=orcl.
  5. Find the DB_CREATE parameter and change it to FALSE. This will prevent the database from being created automatically.
  6. Locate the DB_RECOVERY_FILE_DEST parameter and change it to point to the directory of the existing recovery log. For example: DB_RECOVERY_FILE_DEST=/u01/app/oracle/fast_recovery_area.
  7. Locate the DB_RECOVERY_FILE_DEST_SIZE parameter and change it to a size large enough to accommodate the recovery log file. For example: DB_RECOVERY_FILE_DEST_SIZE=10G.
• After completing these changes, save and exit the initsid.ora file.
• Use the following command to start the database: sqlplus "/ as sysdba".
• Once you are connected to the database, start the database to the NOMOUNT state using the following command: STARTUP NOMOUNT.

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