I'm running Server 2012 x64 and was using software raid to mirror two PCI-e SSDs. However, I've found that the backup card is not actually mirroring the primary; if you boot from the secondary card, the system boots as it was on the second day of use.
If I try and delete the volume on the secondary card and re-do mirroring, Windows tells me that I can't delete a system partition.
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