Installing server 2008, can't partition drives correctly

I have 4 1TB hard drives in a raid 5 config. This was configured through the BIOS.

I am installing server 2008, and saw 1 big chunk of 2.7TB of unallocated space. Perfect so far!
I created a new partition, of 51200mb, and all of a sudden there was seperate unallocated space of 750GB.  This isin't good. Anyone know why this is happening?  I need all unallocated space as 1 disk.

It looks like there is a 2TB limit. Anyway around the limit?
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SmallPrintAsked:
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synackrstCommented:
No need to use gpt should your data disk not exceed 2TB at any point.
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SmallPrintAuthor Commented:
I am trying to install 2008 64bit enterprise
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synackrstCommented:
Hi,

This is most likely related to mbr vs gpt type. Mbr has a limit of 2tb but gpt does not. I generally don't setup servers with huge system partitions, but to utilize more than 2TB you need to use GPT and not MBR. So, smaller c drive and a large data/log/file partition.
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lluddenCommented:
If you don't have an EFI motherboard (ie, booting from BIOS), your boot partition is limited to 2tb.  Other than boot partitions, there is no practical limit - we have non boot partitions over 80 tb.
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SmallPrintAuthor Commented:
instead of creating 1 huge 2+TB virtual disk in the bios raid config, i just created a different 50gb OS partition, and 2 additional partition of even size.   I am able to install to the 50gb partition.  Will I have any problems assigning a drive letter to the remaining 2- 1.3TB virtual disk I made?
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SmallPrintAuthor Commented:
i mean 2 additional virtual disks, not partition (same diff though)
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synackrstCommented:
Did you create one huge raid  and logically split the volumes in the OS? I would go for 1 50-100gb system disk using mbr and one 2+TB gpt data partition should you need.
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SmallPrintAuthor Commented:
I just created 3 virtual disks in the Bios raid config.  Installing OS on the 50GB virutal disk right now without any issues.  Will I be able to assign the other 2 virtual disks a drive letter in 2008?
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lluddenCommented:
There won't be any problem assigning drive letters to your other partitions.  You might want to reconsider splitting them though.  My experience has been that you will always wish one had extra room and the other will have unused space.
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synackrstCommented:
Yea, shouldn't be a problem. You will just need to go into disk management and initialize/create new ntfs partition. From the wizard you will assign your desired drive letter.
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synackrstCommented:
Totally agree, in a lot of situations one huge disk is better than two medium disks where one is full and the other one hardly in use.
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SmallPrintAuthor Commented:
let me check
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