https://www.ibm.com/docs/en/db2/11.5.x?topic=commands-db2cklog-check-archive-log-file-validity
db2cklog - Check archive log file validity command
You use the db2cklog command to check the validity of archive log files in order to determine whether or not the log files can be used during rollforward...
log filecheckarchivevaliditycommand