OSX 10.9 –
RAID Utility says RAID array is degraded but all drives are showing green
All started after error log
Drive 3:5000c5004e189ddf missing – Previous drive status was inuse
Now getting errors daily saying
Degraded RAID set RS1 – No spare available for rebuild
Looking at each drive separately all say "Assigned" except Bay 1 which says "Roaming"
Best Answer
After ignoring the "Drive 3:blahblah" I removed the Drive in Bay 1 that showed status as "roaming" and booted. Since the Mac still booted I was sure that drive was the issue.
I put a new drive in and selected it in RAID utility - Selected "RAID" from the Mac top menu and clicked "mark as spare" and assigned it to my RAID set.
RAID rebuild like a champ!