I tried swapping the cables, and while it was smart enough to still realize the disk was just moved, it did not affect the degraded disk. I decided to go for broke and just take the degraded disk out and "clean" it using DiskPart.  That worked fine, and Windows 7 displayed the disk as "not initialized."  I put it back into the server, and it was registered as being NonRaid...didn't even appear as "new."  Basically, it was appearing as its own volume automatically. I continued booting into Windows Server to verify that I haven't screwed anything else up to put my nerves at ease.  Windows booted, so I went into the virtual disks section of OpenManage and saw that the "new" (rather, old) disk was displayed there.  So, I selected "delete" from the list of available tasks.  It deleted successfully, disappearing from the list of virtual disks. At this point, I figured I could go right ahead and assign a dedicated hot spare to the degraded array from the available tasks.  Nope. No disks available. What? Freaking out now, I went under the "physical disks" section of OpenManage, and there it was with its state as "ready" (opposed to "online").  Under its available tasks, it had "assign global hot spare."  I executed that, and the status of the RAID array under "virtual disks" changed to "rebuilding." [ADMIN NOTE:  Profanity removed per TOU], why was this so difficult? During the time I've spent writing this, its rebuilding progress has reached 4%.  I'll update on the status when it completes.  EDIT: Everything worked successfully.  The rebuilding completed after a few hours and the RAID volume is reading as healthy again.
I have a PowerEdge T110 server with a PERC S100 RAID controller (firmware/"fake" RAID).  Unfortunately, I had a small accident tonight while I was working on that machine.  While attempting to clean up a cable mess, I accidentally yanked on the wrong cable and unplugged the power for the server. While the server was running through POST, it paused and stated that the RAID 1 array was degraded.  By entering the S100 configuration, it tells me that drive 0 is degraded, and the other one is fine.  The server boots just fine. I opened the OpenManage utility which displays the status of the virtual disk to be degraded as well.  However, despite displaying the status as being degraded, absolutely nowhere does it list any option to rebuild the array.  I can't even check for the consistency.  Under the drop-down list for "tasks," the only available options are: That's all.  Obviously, I don't want to do any of those.  The configuration utility in the BIOS also seems useless.  Although it lists the specific physical disk that is degraded, I cannot see any option for rebuilding the array consistency.  Since the physical disk has not failed and is not actually damaged, I don't need or want to replace it. So, why isn't any rebuild option listed, and how can I rebuild this array without deleting the entire volume and restoring from a backup?
RAID 1 array degraded; no option to rebuild