How to Recover from errors ORA-01171 ORA-01122 ORA-01251 ORA-01186
(Doc ID 333620.1)
Last updated on FEBRUARY 14, 2022
Applies to:
Oracle Database - Enterprise Edition - Version 8.1.7.4 and laterOracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
Corruption reported while reading datafile header.
Alert log shows messages like:
Cause
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In this Document
| Symptoms |
| Cause |
| Solution |
| Option 1: Restore the Datafile from Backup |
| Option 2: Backup of Datafile is not available but all archived logs from creation date of the datafile are available. |
| Option 3: Backup of Datafile and archived logs are not available |