Database won’t start because of missing datafile

I had a situation today where my database would not start because “someone” had deleted a datafile.  While deleting the datafile at the OS level was probably not a particularly good decision, things like this do happen occasionally, so how to get the database back up?

Here is the error message when the database refused to start:

ORA-01157: cannot identify/lock data file 14 - see DBWR trace file

This command is the quickest and easiest way to get rid of the problem:

alter database datafile 'c:\database\oradata\orcl\cdbwklw.dbf' offline drop ;

After this the database will start happily.  You may need to drop the tablespace too.

About Mark Nelson

Mark Nelson is an Architect (an "IC6") in the Fusion Middleware Central Development Team at Oracle. Mark's job is to make Fusion Middleware easy to use in the cloud and at home, for developers and operations folks, with special focus on continuous delivery, configuration management and provisioning - making it simple to manage the configuration of complex environments and applications built with Oracle Database, Fusion Middleware and Fusion Applications, on-premise and in the cloud. Before joining this team, Mark was a senior member of the A-Team since 2010, and worked in Sales Consulting at Oracle since 2006 and various roles at IBM since 1994.
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One Response to Database won’t start because of missing datafile

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