Sascha Wildner has brought in improvements to the mps(4)driver from FreeBSD. It’s for LSI Logic Fusion-MPT 2 SAS controllers, and apparently didn’t work very well… until now. Sascha’s commit message details what’s new, including RAID support that is not yet mentioned in the man page.
A running description of activity related to DragonFly BSD.
My commit msg indicated that it was not yet working at the time of the commit, but sephe’s subsequent fixes made it work and all seems to be good now.