+.B * prefrd\fR - component preferred for read in a mirrored file
+.RE
+.RS
+.B * prefwr\fR - component preferred for write in a mirrored file
+.RE
+.RS
+.B * stale\fR - component has outdated data in a mirrored file. This flag is
+not allowed to be set on a component of the last non-stale mirror.
+Once a component is marked