Control-M: 23_EUQ - Event: JOB NOT OK App: BARN-IS-BI-QA-BAB Job: ORACLE-DBVERIFY Folder: 9EUPQ23_SUS-DATABASE-BW_CS
1. Detailed Description of the Issue 
During the scheduled SAP Oracle database backup using BRBACKUP with DBVERIFY, the verification process reported warnings indicating the presence of pre?existing corrupt blocks in one Oracle datafile 
/oracle/BAB/sapdata1/dat_91/dat.data91. 
The backup job itself completed successfully; however, DBVERIFY flagged corruption that already existed at the database block level. 
 
2. GxP Impact 
Not required at the moment. 
No business transactions were impacted, and no SAP application errors were reported during the activity. 
 
3. Actions Taken 
 
Executed BRBACKUP with DBVERIFY to validate all database datafiles. 
Verified DBVERIFY output and confirmed: 
 
No new corrupt blocks were introduced. 
No failing data, index, or LOB blocks were detected. 
 
 
Identified that the corruption is limited to a single datafile. 
Confirmed that all other datafiles were verified successfully without errors. 
Backup completion status reviewed and validated as successful with warnings. 
 
 
4. Root Cause 
The issue is caused by pre?existing Oracle database block corruption in the affected datafile. 
DBVERIFY reconfirmed blocks that were already marked as corrupt in the database metadata. 
No evidence of new corruption or backup?related failure was observed. 
 
5. Workaround 
There is no immediate workaround required at this stage, as: 
 
The backup is valid and usable. 
SAP application availability and functionality remain unaffected. 
The corrupted blocks have not been accessed by active business processes. 
 
Monitoring remains in place to detect any runtime access to the affected blocks. 
 
6. Solution 
 
Perform object?level impact analysis to identify the database segments associated with the corrupted blocks. 
Based on object type, proceed with: 
 
RMAN block recovery, or 
Index rebuild / object reorganization where applicable. 
 
 
Ensure database integrity by validating recovery after corrective actions. 
Continue regular DBVERIFY checks as part of the backup strategy.