Hi, All: I am running 8.1. under /dev, I don't see /dev/md0, so i am trying to add following lines in kernel file and got error messages: options MFS #Memory Filesystem /usr/src/sys/i386/conf/bn39_1: unknown option "MFS" *** Error code 1 Stop in /usr/src. *** Error code 1 any gurus here know what is happeny here?