-.IP "intr" 12
-I/O system calls can be interrupted.
-.IP "rsize=#" 12
-Set read size to \fI#\fP bytes.
-.IP "wsize=#" 12
-Set write size to \fI#\fP bytes.
-.IP "retry=#" 12
-Set mount retry count to \fI#\fP.
-.IP "retrans=#" 12
-Set retransmission count for nfs rpc's to \fI#\fP.
-.IP "timeo=#" 12
-Set initial nfs timeout to \fI#\fP in 0.1 sec intervals.
-.fi
-.PP
-.I Umount
-announces to the system that the removable file system \fInode\fP
-or whatever removable file system was previously mounted on device
-\fIspecial\fP should be removed.
-.PP
-If the \fI-a\fP option is present for either
-.I mount
-or
-.I umount,
-all of the file systems described in
-.I fstab
-are mounted or unmounted.
-.PP
-The system maintains a list of currently mounted file systems.
-If invoked without an argument,
-.I mount
-prints the list.
-.PP
-Physically write-protected and magnetic tape file
-systems must be mounted read-only
-or errors will occur when access times are updated,
-whether or not any explicit write is attempted.
-.SH FILES
-/etc/fstab file system table
-.SH "SEE ALSO"
-mount(2), fstab(5)
-.SH BUGS
-Mounting garbaged file systems will crash the system.
-.PP
-Mounting a root directory on a non-directory
-makes some apparently good path names invalid.
+.It intr
+.Tn I/O
+system calls can be interrupted.
+.It noconn
+Do not connect the socket.
+Used for
+.Tn UDP
+servers that send replies from a
+socket other than the nfs server socket.
+.It tcp
+Use
+.Tn TCP
+transport instead of
+.Tn UDP .
+.It rsize=#
+Set read size to
+.Ar #
+bytes.
+.It wsize=#
+Set write size to
+.Ar #
+bytes.
+.It retry=#
+Set mount retry count to
+.Ar # .
+.It retrans=#
+Set retransmission count for nfs rpc's to
+.Ar # .
+.It timeo=#
+Set initial nfs timeout to
+.Ar #
+in 0.1 sec intervals.
+.El
+.Pp
+.Nm Umount
+removes the
+.Ar special
+device
+grafted
+at point
+.Ar node
+from file system tree.
+.Pp
+Options for the
+.Nm umount
+command:
+.Bl -tag -width indent
+.It Fl f
+The file system is forcibly unmounted.
+Active special devices continue to work,
+but all other files return errors if further accesses are attempted.
+The root file system cannot be forcibly unmounted.
+.It Fl a
+All of the file systems described in
+.Xr fstab
+are unmounted.
+.It Fl t
+Is used to indicate the actions should only be taken on
+filesystems of the specified type.
+More than one type may be specified in a comma separated list.
+The list of filesystem types can be prefixed with ``no'' to
+specify the filesystem types on which no action should be taken.
+(See example above for the
+.Nm mount
+command.)
+.El
+.Sh FILES
+.Bl -tag -width /etc/fstab -compact
+.It Pa /etc/fstab
+file system table
+.El
+.Sh SEE ALSO
+.Xr mount 2 ,
+.Xr unmount 2 ,
+.Xr fstab 5
+.Sh BUGS
+It is possible for a corrupted file system to cause a crash.
+.Sh HISTORY
+A
+.Nm
+command appeared in
+.At v6 .