Datafile corrupt is a partial disaster in database. it will impact for all objects belonging the tablespace. In this case, DBA can either restore the problematic/corrupted datafile from backup.
Category: Backup & Recovery
Nov 07 2020
In most cases, the database marks a block as media corrupt and then writes it to disk when the corruption is first encountered. No subsequent read of the block will be successful until the block is recovered. You can only perform block recovery on blocks that are marked corrupt or fail a corruption check.
Oct 27 2020
Recovery Catalog: A set of Oracle tables and views used by RMAN to store RMAN repository information about one or more Oracle databases. RMAN uses this metadata to manage the backup, restore, and recovery of Oracle databases. Target Database: In an RMAN environment, the database to which you are connected as TARGET. The target database is …
May 12 2020
A backup is a copy of data. This copy can include important parts of the database, such as the control file and datafiles. A backup is a safeguard against unexpected data loss and application errors. If you lose the original data, then you can reconstruct it by using a backup. So taking database backup is …
Apr 03 2020
The Data Pump feature had been introduced from Oracle 10g. Until Oracle 9i, There were a tradition export and import (exp, imp) tools for logical backup. Nowadays Data Pump (expdp & impdp) utilities are mostly use by oracle DBA. Data Pump is very useful tools to migrate database in difference version of Oracle databases or …
Mar 01 2020
DBA needs to rename or move oracle file from one filesystem or ASM DISKGroup to another. Move Datafiles Using ALTER DATABASE MOVE DATAFILE command – 12c and onward Moving Datafile Using RMAN with offline option – 10g or 11g Prerequisites: Database should be configured archive log mode.