Note: this is NOT an unRAID bug, but a defect in Marvell disk controller chipset modules.   unRAID OS Version:  Probably all v6 releases with virtualization support enabled   Description:  There is a bad bug in the Marvell code for certain disk controller chipsets that causes connected drives to be unable to communicate when IOMMU is enabled.  If VT-d or AMD-Vi are turned on, then DMA reads fail, and the drives are unavailable.  Once turned off, the drives appear and work fine.  These card