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Error: Cannot Identify/Lock Data File in Oracle
What Happens If You Lost a Data File in Oracle?
✍: FYIcenter.com
After you shutting down an Oracle database, you accidently deleted a data file from the operating system. If you try to start the database again you will get error when Oracle tries to open the database after mounting the database. The following tutorial examples shows you what will happen if the data file c:\temp\my_space.dbf is deleted. Oracle can still start the database instance and mount the database. But it will fail on opening the database as shown below in a SQL*Plus session:
>sqlplus /nolog SQL> connect SYSTEM/fyicenter AS SYSDBA SQL> STARTUP ORACLE instance started. Total System Global Area 100663296 bytes Fixed Size 1285956 bytes Variable Size 58720444 bytes Database Buffers 37748736 bytes Redo Buffers 2908160 bytes Database mounted. ORA-01157: cannot identify/lock data file 5 - see DBWR trace file ORA-01110: data file 5: 'C:\TEMP\MY_SPACE.DBF' SQL> SHUTDOWN; ORA-01109: database not open Database dismounted. ORACLE instance shut down.
2019-04-09, 854👍, 0💬
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