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SaltLakeGolfer

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Cannot boot system - Operating System Not Found

I have a 2003 Microsoft Small Business Server. I installed a program Symantec Endpoint Protection, to run as a centralized Anti-Virus solution. The server had to reboot to complete installation, and when this reboot happened, I was unable to boot to the drive with the OS. I am not sure if installing this is a coincidence or not, but I wanted to give all the facts of what I was doing right before the error. When I reboot, I now get the "Operating System Not Found" error. I am not runnning a RAID, and have checked my BIOS for boot priority, and the HD is set as the first boot device.
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dcsdave
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Do you have any USB or other  external devices plugged into the server?  I have seen on occasion that when a USB drive or some other periferal is plugged in it interfers with the boot of the OS.  I have seen this happen even if the BIOS is set corretly also.  

Are you running a single OS drive?  Do you run backup software and have an emergency recovery plan?  If not I would pop out the drive and slave it into another PC to make sure all the data is still ok and probably do a quick backup if you don't have one already.  I would then look at trying to restore the OS from disk.

Best of luck to you.
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SaltLakeGolfer

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I don't have any USB devices plugged in.  There are 2 drives in the server, and I thought I set them up as mirror, but I tried each drive individually, and they won't boot individually either.
Is it a hardware or software RAID?

Can you get into the raid monitor/configuration?  (Usually ctrl+c or i)

Inside of there you can see if the array is ok or degraded.  You can also see which drive is still configured to use the array and what type of array might have been setup.

Keep me posted and I will continue to try and help.
This is a software RAID. And I am positive this was setup originally as a Mirror. The error I originally posted is not 100% accurate, but I have the PC with me now, which I didn't when I posted the question.  The error is "ERROR LOADING OPERATING SYSTEM".  I used CNTL-I to get into the Raid Manager, but bothj disks say NON-Raid Disk.
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dcsdave
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