It withour warning overnight fixed itself, the backplane returned to green state.  Not sure why, but I can live with ot. John B
I had one of my Cheetah 300 GB SAS drives fail on my Poweredge 2900.  I have 2 RAID connectors, Connector 0 (RAID) with 4 physical disks 300 GB and Connector 1 (RAID) with 4 physical disks at 300 GB. There are 2 virtual disks, VD0 RAID 5 @  557.75GB, and VD 2 RAID 5 at 836 GB.  The physical drive that failed was on Connector 0, Physical disk 0:0:2.  I had a spare and replace it.  I immedialtely saw where the Virtual disks were resyncing. After the resyn or rebuild,  tthe status of the disk 0:0:2 went from failed to READY.  however I still have the yellow triangle over each enclosure backplane, everything else has the green check marks, and the disk I replaced shows ready, not ONLINE.  WHAT should I do at this point?  I tried to transform the new disk into a hot spare, but the backplane still shows a yellow triangle.  How do I get the disk to transfer from ready to online? I am afraid I am compramising the performance of this server.  The consitancy checks and rebuilds completed sucessfully, but still have the yellow warning signs over the backplane connectors.  ANY Help would be appreciated Regards John Bardos    
Hard Disk Failed on Poweredge 2900, Replaced but Backplane still Shows Yellow 
Warning ICON