Input syntax:
-w [use_dbv]Default value: No check

Restoring the last check, followed by a check of the ORACLE block structure using DB_VERIFY:
brrestore -b -w use_dbv
Restoring the archived offline redo log files nos. 112- 250 and checking them for readability:
brrestore -a 112-250 -w
See:
Backup Verifications