+to perform a full execution as requested by one of
+.Fl i,
+.Fl R,
+.Fl r,
+.Fl t
+or
+.Fl x
+command without actually writing any file on disk.
+.It Fl Q Ar file
+Use the file
+.Ar file
+in order to read tape position as stored using the dump Quick File
+Access mode, in one of
+.Fl i,
+.Fl x
+or
+.Fl t
+mode.
+.Pp
+It is recommended to set up the st driver to return logical tape
+positions rather than physical before calling dump/restore with
+parameter Q. Since not all tape devices support physical tape
+positions those tape devices return an error during dump/restore when
+the st driver is set to the default physical setting.
+Please see the st man page, option MTSETDRVBUFFER, or the mt man
+page, on how to set the driver to return logical tape positions.
+.Pp
+Before calling restore with parameter Q, always make sure the st
+driver is set to return the same type of tape position used during the
+call to dump. Otherwise restore may be confused.
+.Pp
+This option can be used when restoring from local or remote tapes
+(see above) or from local or remote files.