RaidProblems,  Ok, it sounds like you actually have 2 raid 1's, or possibly a Raid 10, as you can't have a 4 drive raid1. If both were degraded, and in the same array span, then it wouldn't boot. What I would suggest is to go to the controller BIOS and assign drive 1 as a Hotspare, and it should start a rebuild. After that then do the same for the replacement drive.  Let me know how it goes.
I have a Poweredge server with a Perc S100 controller with 4 hard drives (not hot swappable) in a RAID 1 configuration.   I had one hard drive that was degraded (drive 2). I disconnected the wrong hard drive (drive 1) and booted with it disconnected and went into the RAID configuration screen and it told me that one drive had failed (the one I disconnected) and of course the other one it said it was degraded like usual. The computer wouldn't boot into windows and I quickly turned it off and reconnected the hard drive.  When I booted and went into raid mode, it now said drive 1 and 2 were degraded. How do I fix this issue? I would like the good hard drive to show that its working and not degraded before I replace the bad hard drive.   It does boot and it does work right now.   I have a powedge T310 server running windows server 2008.
Messed up raid when trying to fix