Command RV[N] - create recovery volumes
Create recovery volumes (.rev files), which can be later used to reconstruct missing files in a volume set.
This command makes sense only for RAR multivolume archives and you need to specify the name of the first volume in the set as the archive name. For example:
WinRAR rv3 data.part01.rar
The optional <N> parameter specifies a number of recovery volumes to create and must be less than the total number of RAR volumes in the set. You may also append a percent character to this parameter, in such case the number of creating .rev files will be equal to this percent taken from the total number of RAR volumes. For example:
WinRAR rv15% data.part01.rar
You may read more about recovery volumes here.