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Balack

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My Windows 2008 64bit can't support disk greater than 2Tb, how?

This is new setup of windows 2008 server. A storage of more than 2TB being allocated to it, but it only detects it as 2.0TB although the exact space is 2.7Tb. How to make w2k8 identify it?
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PowerEdgeTech
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The disk must be converted to GPT.  MBR disks have a 2TB limit.  You will not be able to do this if this is your boot disk (unless 2008x64 is installed on an EFI-enabled system).
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Balack

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HI PowerEdge Tech,

That's mean the problem is on MBR of the boot disk? BTW, how to make 2008x64 is installed on an EFI-enabled system?
It is not a "problem" with it ... just a limitation of any MBR disk.  

How many physical disks do you have in the server?
How many "disks" are showing in Disk Management?
What RAID configuration are they in ?
What system do you have?  
What RAID controller are you using?

You will have to check the specs for your server to see if it is EFI-capable.  This will involve a reinstall of Windows.  
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I'm using IBM blade HS22, and think this blade is efi- capable. My w2k8 64bit is setup, and in the disk management, I can see the 2.7tb shared space is allocated. When I want to create a partition, a popup box shown, and present a choice - convert to gpt. Does it means that I can use the whole 2.7tb?
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good