I newly built NetBSD-4-0-RC2 kernel, but when I loaded it to the target, 
the root file system of the target mounted read-only.

===> Summary of results:
         build.sh command: ./build.sh -T /usr/tools -U kernel=IBM1161
         build.sh started: Fri Oct 12 01:40:45 EST 2007
         NetBSD version:   4.0_RC2
         MACHINE:          i386
         MACHINE_ARCH:     i386
         Build platform:   NetBSD 4.99.31 i386
         HOST_SH:          /bin/sh
         TOOLDIR path:     /usr/tools
         DESTDIR path:     /usr/src/obj/destdir.i386
         RELEASEDIR path:  /usr/src/obj/releasedir
         makewrapper:      /usr/tools/bin/nbmake-i386
         Updated /usr/tools/bin/nbmake-i386
         Building kernel without building new tools
         Building kernel:  IBM1161
         Build directory:  /usr/src/sys/arch/i386/compile/obj/IBM1161
         Kernels built from IBM1161:
          /usr/src/sys/arch/i386/compile/obj/IBM1161/netbsd
         build.sh ended:   Fri Oct 12 01:52:01 EST 2007
===> .
t5048$

I can't give you a dmesg output because I can save anything.  I can't 
mount a memory stick either.
ibm1161$ mount -t msdos /dev/sd0e /mnt
mount: /mnt: Bad system call