ROM. If Option ROM is disabled, you cannot use the SATA de- vices connected to the Marvell SATA3 controller as Boot Device.
We recommend to use Intel® C224 SATA ports (SATA_0_1 to SATA_4_5) for your bootable devices. This will minimum your boot time and get the best performance. But if you still want to boot from the Marvell SATAIII controller, you can enable it from the UEFI.
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