PERC H730 mini on 5.6

Dear list, i'm in progress in installing 5.6 stable on a Poweredge R730. This system has a PERC H730 mini raid controller. The OpenBSD installer aborts with the following message when fdisk wants read disk geometry: snip fdisk: DIOCGPDINFO: Input/output error fdisk: Can't get disk geometry,

Re: PERC H730 mini on 5.6

Sorry for the incomplete bug report. The raid configuration is a common hardware based raid1. Two 1 TB physical disks provide one logical disk. Attached is a dmesg report (5.6 stable) after pressing 'S' to get out of the installer to get a shell. snip OpenBSD 5.6 (RAMDISK_CD) #303: Fri Aug 8