I have a lot of 9211-8i’s in the lab, probably about 12, all flashed to IT mode. These are a godsend as they just work. They’re easy to flash to IT mode (rids them of any RAID, they become HBAs) and are 6GBp/s which is awesome.
One of the things I didn’t know until quite later on is that these cards by default (on Windows at least) do not support spindown calls from the OS, meaning my disks are running 24/7 which wasn’t a problem until I had about 20 disks all running and I realised how much power that actually was for no good reason. After a little searching I found forum posts from people who had modified the INF driver of the card and gotten the power down to work, after putting it off for a while I finally did it and got it to work and have noticed both power loss and a little bit of a temperature drop which is nice.