The Volume has failed but the drive is new and there have been no signs of problems until a bios update rejigged the boot order of my machine. This then meant I was trying to boot from a non system disk without realising. I have reassigned the order in the bios but now one of the drives won't let windows see it. Under disk management it comes up as a missing dynamic drive and has a failed status. It won't reactivate and I have important client data on it...help!