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Please follow below points that guides you through the overall check procedure and resolution

  1. General Information
  2. Detecting Corrupted Blocks
  3. Consistency Check with 'ANALYZE' command
  4. Consistency Check with DBV
  5. Consistency Check with RMAN
  6. Consistency Check with Data Pump
  7. Which object is stored in the corrupted block(s)
  8. Checks found corrupted blocks. What to do now