ORA-19575: expected 1814132 blocks in file /archive/DB_1_158247_747682823.arc

Seems archive file is corrupted nothing to do with this file. During archive backup from RMAN script file seems to be corrupted and through error ORA-19575. If we have mirror image of Archive file available then we replace with that file other wise we need to un-catalog the file from control file. So that RMAN backup run without errors.

Solution:

1. Rename the file present in the location.

mv  /archive/PROD_1_158247_747682823.arc   /archive/PROD_1_158247_747682823.arc_bkp

2. Uncatalog the file with following command.

RMAN> Crosscheck archivelog;

3. Run the regular backup of archive.

RMAN> backup archivelog all;

4. Its working fine.