Highpoint Rocket 133 and 11.x revisiting

have running 10.3 server with 6PATA and 6SATA. Installation 11.1 sees all drives (for partitioning display) but hangs stonedead thereafter on analysing system with Rocket 133 select light on.
10.3 sees old pci-IDE (Silicon Image, Highpoint) as hda,hdb…, newer ones (Nvidia,Via6421) as sd_ and runs perfect like that.
11.1 (like 11.0) sees old PATA also as sd_, can access them during initial phase but hangs when attemting to present system summary (both normal and safe mode kernel), the select light on Rocket 133 pointing to accessing it before death.

any light on this? thanks