If you have a couple of cards, you could always use one with a couple of new drives, then flash the firmware and see what happens.
I've no reason to think that it wouldn't, but I've not tested it. In our case, I was starting from scratch with a couple of news disks, so have not had the opportunity to see whether an existing RAID setup would be carried over successfully to the new firmware on the card. If you want to be as sure as you can, run the machine on which you're doing the flashing on a UPS, have only one RAID card in at a time and disconnect all of the disks while flashing the card. there's always a chance of failure and therefore bricking the card. Hi Mike, Flashing the firmware and BIOS on an add-in card is likely to be the same level of risk as flashing the BIOS on a motherboard, i.e. The above procedure allowed the H200 I was using to detect and use two 3TB disks. If any indicate a failure, double check that you copied the correct files onto the bootable media.