Patiko84, You will need to boot to the BIOS (F2) and then go to Boot Settings and set it to UEFI. Then restart the server and boot to the media for the OS install. The issue you are having is that NTFS limits to 2 TB, where as GPT doesn't limit, but can't be booted to in BIOS mode. So we can create a GPT and boot to it in UEFI mode.  Let me know how it goes.
Good day. i upgrade my DPE R210 to 2 x 1.5 GB HDD (2.7TB) configure RAID 0 and i have some problem in install windows 2008 R2 SP2. Windows 2008 see only 2 TB... What is the problem?
Poweredge R210