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Why would RAID 1 (Mirror) Fail with 2 Healthy HDD's?

Last response: in Storage
November 20, 2009 8:58:35 AM

I have Server 2008 Standard 64bit installed with Exchange 2007 and a few other things. I am running a Intel server with 2 Intel Zeons and 2 x 750GB SATA drives in RAID 1 using the onboard raid controller. The intel board is the S5000PSL. Why would the RAID configuration go into a normal SATA configuration with 2 healthy drives? I am trying to find out what the possible causes could be.
One reason could be a power failure.
November 20, 2009 11:18:03 AM

How about loose power cables or SATA cables or you did not shut down the computer completely and shut off power. A power faliure would also be a cause. Do you have the computer on a UPS?