Comment 5 for bug 219393

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Phillip Susi (psusi) wrote : Re: ich9R raid array not detected

It looks like Intel has some bugs. Looking closely at the data, both disks disagree on the size of the primary disk. It looks like the bios may have a bug when creating the array which causes it to record the size incorrectly in one of the disks, which results in the family signature being different on both disks, and the windows driver apparently doesn't bother to verify that they match as they should.

Try updating your bios and recreating the array. If that doesn't help, you may need to file a bug report with Intel.