rc.sysinit refers to the old 'raidadd' and 'raidrun'
programs which are no longer part of the raidtools package.
Instead, 'raidstart' is used to start the raid subsystem.

Consequently, the rc.sysinit file needs to be modified, such
as follows:

if [ -f /proc/mdstat -a -f /etc/raidtab -a -x
/sbin/raidstart ]; then
        action "Starting up RAID devices" raidstart -a
        rc=$?

        # A non-zero return means there were problems.
        if [ $rc -gt 0 ]; then
...etc