I tried to get RAID going in Linear and Raid 0 mode.
(See my other bug report on the SPARC architecture RAID
problems (Bug #2807)). I was not able to get the RAID
modules to correctly load until I moved the running of
the /etc/rc.d/rc.modules script to before the raid is
started. See the initscripts.diff file at the listed
fixed in initscripts-4.18, available in today's rawhide.