Further debugging through the logs

Comparing the start up of this MDS/MGS pair  with a know good system,

On the known good system:

mgc_copy_llog()  

lustre_start_simple() starting obd goodfs-MDT0000-lwp-MDT0000 (type=lwp)

..etc etc

On the bad system:

mgc_copy_llog()

/* no lwp stuff at all */

For some reason, my MDS/MGS pair are not invoking the lwp OBD.