-If \fB\-\-only\fR <\fImirror_id\fR[,...]> option is specified, then the
-command will verify the mirror(s) specified by \fImirror_id\fR(s) contains
-exactly the same data as the other mirrors for the mirrored file.
+If \fB\-\-only\fR <\fImirror_id\fR,\fImirror_id2\fR[,...]> option is specified,
+then the command will only verify the mirrors specified by \fImirror_id\fRs
+contain exactly the same data. At least two \fImirror_id\fRs are required.
+This option cannot be used when multiple mirrored files are specified.
+.br
+If \fB\-\-verbose\fR|\fB\-v\fR option is specified, then the command will print
+where the differences are if the data do not match. Otherwise, the command will
+just return an error in that case. This option can be repeated for multiple
+times to print more information.