quick question about raid controllers

[romero3000 at romero3000.com]

sorry i am cross posting this question, but i haven't really gotten any
response from Freebsd-questions. Here it is:

Are there any SCSI raid controllers that have real-time array rebuild
capabilities/tools for FreeBSD?? All of the ones I have used so far
require reboot for rebuilding/modifying. Also are there any good tools for
monitoring RAID Arrays???