I believe  Disable BIOS support is only for BOOT and all virtual disk should be available once OS is loaded. You can check the same by booting to USB
R610 + Perc 6/i Perc has 3x VDs, VD0=2xHDD/Raid 1 VD1=3xHDD/Raid 5 VD2=1xSSD /Raid 0 which is currently the OS ( Hyper-V core 2019 ) - will be reformatted after transition. I read from the Perc manual ( p107) that Disabling the BIOS support will disable booting from the controller ( interrupt 13h), but it also stated that this interrupt is also used for disk read/write functions. Question: If I disable the BIOS support, and boot from a USB with OS ( Hyper-V core 2019 ), will the OS still be able to see/use the 3xVDs as they are configured now.?
Perc 6/i - Disable BIOS support