/sbin/mount -u / /dev/sd0a (assuming you have SCSI disks) -or-
/sbin/mount -u / /dev/wd0a (assuming you have IDE disks)

DongSoo wrote:
> 
> Hello
> after I installed and make it boot.
> 
> I tried to mount the root file system read/write, to configure the rc.conf
> using
> # /sbin/mount -u -w
> 
> and it says
> root_device on / type ffs (local, read-only)
> 
> how should I correct this?
> 
> help, please.
> 
> thanks
> dongsoo