Friend of ours built our computer with 2 mirror raids set up using motherboard RAID1. The one assigned to D keeps losing its drive letter every time the computer restarts, however I can find it and reassign it to D easily enough through disk management. In disk management it reads as Mirror_raid_01. The one which was assigned to F however has lost its letter and when I look at it in disk management I can see it's there, but it no longer says Mirror_Raid_02 like it did before it's just a blank name there now. If i knew how to attach a photo of what I see in disk management I would. Both raids on startup show they appear to be healthy and everything so I can't figure out what to do. I'm just not tech savvy enough for these things and I apologize ahead of time if I sound like an idiot.