Hi!
This is a problem for the installer. The running RAID blocks the two disks and makes them unusable for the installer. While the installer is smart enough to handle some cases, like Linux software raid it uses itself, it isn't smart enough to shutdown every raid implementation.
OK, this is good to know, and sounds somewhat familiar based on some of the other threads in the email list here.
To make the installer work you have to disable the RAID or zero out the metadata (either at the start or end of the disk) so no raid is started. The disks should then appear in the installer. The installer needs to see a plain /dev/sda, /dev/sdb, ... instead of /dev/cciss/c0d0 and similar.
We can try this during the next few days and provide an update. As far as I understand, the disk controller (HP P420i) is RAID only, but perhaps it is OK to simply create a single-disk RAID-0 array and see whether the installer sees that. The interesting thing is that currently the RAID-1 array appears in the installer shell as /dev/sda. I read a bit about more advanced steps to turn off RAID on the controller, but it seems quite involved and not really something we want to try unless absolutely needed (e.g., https://systemausfall.org/wikis/howto/Disable%20HP%20Proliant%20Hardware-RAI...).
Do you happen to know whether there is an iso of the Qlustar 11 installer still available? We've installed things in the past with Qlustar 8 (I think), so I was a bit surprised the installer now has trouble with hardware RAID arrays.
Hope that helps,
Indeed it does. We'll update again soon.
Best, Dave