Edit: I seem to have mixed up which drives you are having the problem with. I have changed the reference.
I think, because the 3TB drive is basically empty, we should clean and reconfigure it. I would suggest doing this outside of Windows because it will add an MSR partition at a 17 K offset. You can do this in Disk Management if you want. You could always do it the below, later if you wanted. But in Disk Management, make sure to convert the drive to basic then gpt and all the partitions would have to be removed first.
So if you could get into the Windows RE environment and use the command prompt, we could use Diskpart to clean and configure. Once in the Command Prompt, type the following commands with enter after. Make sure when you select a disk, it is the 3TB one.
Diskpart
Lis dis
sel dis 1 <-- Make sure Disk 1 is the 3TB drive from the prior listing.
This next step will wipe the drive you selected, so be very sure.
clean
convert gpt
exit
Now you should be able to partition and format the drive the way you want using Disk Management.
As far as the SSD, I am not an expert in RAID, so whether it thinks it is part of a RAID array, or just a Dynamic drive, I can't really judge. Maybe someone else will know.
The Intel utility is actually called Rapid Storage Technology and there may be an icon for it in the hidden icons on the Taskbar or something on the Start Menu. But I would use it, if you can find it, to check the drive to see if it is configured in some type of RAID. I am not sure what Acronis can do.
If you can't find the Intel utility, it is probably a download for your system, if you wanted to use it. And normally listed under the SATA section of the drivers.