In rc.conf file, rc_configed=YES
and I got login prompt just below.

.....
md0: internal 28672 KB image area
boot device: <unknown>
root on md0a dumps on md0b
root file system type: ffs
Enter pathname of shell or RETURN for sh:
May  4 00:20:04 init: single user shell terminated, restarting
Enter pathname of shell or RETURN for sh:
We recommend creating a non-root account and using su(1) for root access.
# exit
Sat May  4 00:20:12 GMT 2002
May  4 00:20:12 init: kernel security level changed from 0 to 1

NetBSD/sandpoint (Amnesiac) (tty00)

login: root
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001
        The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994
        The Regents of the University of California.  All rights reserved.

NetBSD ?.? (UNKNOWN)

Welcome to NetBSD!

tset: Command not found.
We recommend creating a non-root account and using su(1) for root access.
#
# cd /etc
 cat rc.conf
#       $NetBSD: rc.conf,v 1.96 2000/10/14 17:01:29 wiz Exp $
#
# see rc.conf(5) for more information.
#
# Use program=YES to enable program, NO to disable it. program_flags are
# passed to the program on the command line.
#

# Load the defaults in from /etc/defaults/rc.conf (if it's readable).
# These can be overridden below.
#
if [ -r /etc/defaults/rc.conf ]; then
        . /etc/defaults/rc.conf
fi

# If this is not set to YES, the system will drop into single-user mode.
#
rc_configured=YES

# Add local overrides below
#

- Original Message -----
From: "David S." <davids@idiom.com>
To: "Boo Geum Jung" <bgjung@etri.re.kr>
Cc: "Org Netbsd-Help@Netbsd." <netbsd-help@netbsd.org>
Sent: Tuesday, May 07, 2002 3:49 PM
Subject: Re: fstab.md


>
> >  I installed netbsd using ramdisk.
> > But it recongnozed its file system "ready-only".
>
> Your system probably has booted up into single-user mode because you
> haven't added the line
>
> rc_configured=YES
>
> to '/etc/rc.conf'.  See the man page for 'rc.conf'.
>
> David S.
>