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How does Oracle accidentally delete a DBF data file?

Source: Internet
Author: User
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1. Do not restart the DB instance
2.ps-ef | grep dbw0 View ora_dbw0_ instance process ID
3.cd/proc/process ID/FD can see 261-/u01/app/oracle/oradata/orcl/users01.dbf (deleted) Identity delete
4.cp/proc/process ID/FD/261/U01/APP/ORACLE/ORADATA/ORCL/USERS01.DBF Copy the deleted data file back
5.alter database datafile data File number offline
6.recover datafile data file number;
7.alter database datafile data file number online;

How does Oracle accidentally delete a DBF data file?

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