Switch -RR[N] - add data recovery record
This switch is used when creating or modifying an archive, to add a data recovery record, containing <n> (n=1… 524288) recovery sectors, to the archive. You may also append <n> with the percent character or 'p' to specify the recovery record size in percent to the archive size.
Shell mode equivalent of this switch is the "Put recovery record"option in the Archive name and parameters dialog.
WinRAR a -rr8 WeeklyBackup *.dbf
WinRAR a -rr3p Books *.txt
See also the rr[N] command description and recovery record topic.