I'm using a Supermicro X9SRE-3F motherboard with the latest BIOS and 2x 4TB drives connected to the on-board SATA controller.
If I set the BIOS to RAID and create a RAID 1 array, the array shows up in the BIOS as 3.6TB. However when I boot Windows (on a separate RAID 1 array), the 4TB drives show up individually in disk manager as 2x 1.62TB drives.
I could use Windows 2012 to set up software RAID 1, but when I set the BIOS back to 2x individual drives, they still show up in Windows as 2x 1.62TB drives.
How do I access the full capacity of these drives?