Dell CERC SATA 1.5 Degraded Array

I have an older Dell Poweredge 1800 with SBS 2003 that I'm using to run backups.  
The server had a constant tone alarm.  I rebooted to see what came up, and sure enough is says that Array 0 is degraded.
It is in RAID 5.  I have never done this before, but it sounds straight forward.  I opened the configuration utility, selected manage array to see which disk has failed, and then I got this message.

Configuration Change has been detected in the system. If you reject the configuration change, you will not be able to modify current configuration. I you accept, it will be updated to the current configuration.  

Accept or Reject?
What changed?  Will accept delete the current Array settings?
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paulfarmerIT DirectoryAsked:
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PowerEdgeTechIT ConsultantCommented:
You should accept. Although I can't guarantee it from the information provided here, what you will likely see when you accept it is two online disks and one failed disk. This is the equivalent of a "foreign" configuration on other controllers, and accepting is essentially importing the Disk view of the configuration.

Once you have accepted it, you can either replace and rebuild the failed disk, or try simply rebuilding the existing disk.

Going forward, you should install and use OMSA (OpenManage Server Administrator) to monitor the status of the RAID/disks, instead of rebooting.
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paulfarmerIT DirectoryAuthor Commented:
Is OMSA a free download from Microsoft?
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PowerEdgeTechIT ConsultantCommented:
No, it is a free download from Dell for PowerEdge servers:

http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=G2WT6&fileId=2883471492&osCode=WNET&productCode=poweredge-1800&languageCode=EN&categoryId=SM

Download and run to extract, then run C:\Openmanage\windows\setup. Choose Custom and make sure Storage Management is installed. Add yourservernameoripaddress:1311 to IE's Intranet zone.

You will also want to make sure all system firmware is up to date after the array is healthy (BIOS, ESM, PERC, HDD, NIC, etc.).
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paulfarmerIT DirectoryAuthor Commented:
Thanks.
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