I had a power problem with my WServer 2012 R2 which I think I have solved. All the involuntary restarts played havoc on my RAID 5 Array and I lost a disk. It is a 5 disk system with each disk being 3TB. I have never had to rebuild a disk before. So I got a new disk, popped it in, made it a "Spare" and selected the disk to be rebuilt. I also enabled automatic rebuild with hot plug. I just don't know if anything is happening. I know it takes a long time but how can I tell if there is any progress. The new disk is still marked as a "Spare" and is not part of the Array. In the meantime, the failed disk shows up in the IRST window. It shows as part of the Array, but at 0 bytes with an unknown address. I have tried hovering over various items and I cannot tell if the process has started. It's been a couple of hours. I also don't know how to delete the old failed disk. The OS is degraded as well but I figured this will work itself out once the Array comes back into line, and the disk errors can be corrected. Any information and advice is appreciated.