Few Blocks in Datafile got corrupted
SELECT header_block FROM dba_segments WHERE segment_name='EMP';
select OWNER, TABLESPACE_NAME, header_block FROM dba_segments WHERE segment_name='EMP';
col FILE_NAME for a50
select FILE_NAME, TABLESPACE_NAME from dba_data_files where TABLESPACE_NAME='USERS';
dd of=/u01/app/oracle/oradata/DEVDB/users01.dbf bs=8192 conv=notrunc seek=147 -- EOF
corruption test
EOF
alter system flush buffer_cache;
select * from scott.emp;
backup validate database archivelog all;
select * from V$DATABASE_BLOCK_CORRUPTION;
select * from scott.emp;
https://docs.oracle.com/cd/B10501_01/server.920/a96652/ch13.htm
dbv file=/u01/app/oracle/oradata/DEVDB/users01.dbf blocksize=8192
col FILE_NAME for a50
select FILE_NAME, FILE_ID from dba_data_files;
recover datafile 4 block 147;
select * from V$DATABASE_BLOCK_CORRUPTION;
select * from scott.emp;
#BlockCorruption #RMANRecovery #DatafileBlockCorruption #Restore #Recovery #ASM #Oracle #RAC #Database #Exadata #ASM
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