Poweredge R520 UEFI Hyper-V - Too many partitions

We have a brand new Dell Server (R520) 32GB of ram, with 4 x 2TB hard drive, raid 5, usable 5.5TB's or so, I would like to install Windows 2008 Hyper V server. The issue that I am having is that I only want two partitions, one 160GB and the other the rest of the 5TBs, when I use the lifecycle manager it will allow for two partitions, but won't find the boot option for my hyper v, unless I choose BIOS mode, but when I do that I have to make several partitions no larger then 2TBs, what OS in the lifecycle manager do I choose?

Please advise me for the install.

Thanks for your time.
DotFoilAsked:
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David Johnson, CD, MVPOwnerCommented:
you need a gpt drive not a mbr drive
I'm guessing you want to use hyper-v as the base operating system. When you boot the system you will be presented many options and you must boot with the EFI boot and not the legacy cd/dvd boot option.

subsequently you will get an Microsoft boot option in your boot preferences. You will then use it from now on once the OS has been installed.
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David Johnson, CD, MVPOwnerCommented:
If you have previously initialized and partitioned the drive you will need to goi into diskpart from the f10 command prompt and then clean the drive

diskpart
sel disk 0
clean
exit
and then refresh the drive selection.

if need be, you can just install the operating system (hyper-v) and from diskpart shrink the disk to your desired size then create a new volume (5.5TB)
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DotFoilAuthor Commented:
Thanks for the time you spent, I ended up using this program to create a bootable usb

http://rufus.akeo.ie/
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Windows Server 2008

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