Raid 5 Error

[Khalil]

I am getting a Raid 5 Critical Error when I am booting on a domain server I built 3 years ago. Then it says it is calibrating array, takes about 5 minutes then boots into Server 2003 just fine.
I rebooted several times and it keeps doing the same thing, I ran sea tools diagnostics and all 3 hard drives are healthy.

Here is the motherboard I am using http://www.tyan.com/product_board_detail.aspx?pid=199
I am using the onboard Raid Controller.
Question here is this a driver issue? I am going to back up the data before attempting a windows repair so I can re-install the raid drivers at the F6 prompt.
I have never updated raid drivers on a working raid array in this fashion. Normaly we just back up and wipe the drives and start fresh but I would rather not do that due to lack of time.
Any advice?

[glc]

3 hard drives in RAID 5 is very risky. There is no room for error if a drive dumps.

[Khalil]

3 hard drives in RAID 5 is very risky. There is no room for error if a drive dumps.

It has 4 drives, my mistakes one of the drives is dead. I am going to replace it, that is what the critical is all about. I had forgotten how many hard drives I put in it.
Thanks for responding

[glc]

That error should clear up when you get the failed drive replaced and the array rebuilt.