I have a client who is using Windows 8.1 and setup a software RAID mirror. The primary hard drive on his workstation crashed, but he was able to successfully boot from the secondary plex hard drive (mirrored drive). He removed the failed drive and attempted to boot from the secondary plex because he wants to added another hard drive to mirror it again, but he receives an error saying there is missing hardware. I thought the purpose of the software mirror was to allow for this sort of thing. I have successfully achieved the above in Windows 7, but not Windows 8/8.1. Any ideas or thoughts?