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Server 2012 r2 and a partition larger than 2TB

Posted on 2016-08-27
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Last Modified: 2016-11-22
Hi All,

Just got stuck creating a Hypervisor.

I have 2.8TB available to me.

I have created a single virtual disk using all the disks (dont worry - I am happy with this config :) )

When I try to install Windows.. And I create my system partition .. thats fine..  100GB however, then Windows carves up the remainder as 1950GB unallocated and 750GB unallocated.

I have deleted the VD and recreated in raid manager (Dell box) and also used diskpart to turn it into GPT .. which it demonstrated it was.

I then created my 100GB OS. Same 1950GB and 750GB unallocated appeared. Once built, it still is unusable in Windows Server 2012 r2.

What I am doing wrong here guys and gals?

many thanks in advance

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Question by:roycasella
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13 Comments
 
LVL 7

Author Comment

by:roycasella
ID: 41772949
When I create the parition after converting to GPT .. and is shown as GPT

When I create a parition either 100Gb and left over or the whole thing, when I then run diskpart again, it no longer says GPT.

Many thanks in advance everyone.

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LVL 7

Author Comment

by:roycasella
ID: 41772961
Changed uefi and now cant boot from the usb stick and no DVD :(

need some help please

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LVL 88

Expert Comment

by:rindi
ID: 41772963
Create a small virtual disk and install the OS to that. Then create your other large virtual disk and add it to your VM as a 2nd disk. That disk you can now convert to GPT and then use it's total space.

For the boot disk to be GPT, your system must use UEFI, and the installer must also be booted using EFI.
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LVL 7

Author Comment

by:roycasella
ID: 41772969
Thanks rindi... Just to be clear.. this is all at the HOST level.. not got to the VMs yet as I struggling with the HOST build and getting the disks right.

I am using 12 300GB disks.

So I need to give up 1 well 2 disks really in a RAID 1 to boot.. so I am only left with 10x 300gb in a RAID 6 which means I have lost 600GB storage and the iops on the spindles (not a major thing.. but would like them and others said this should all be possible... so would love this).

Im not sure how I could do what you ask by then adding this back into to one big RAID ARRAY again, after I have created to raid arrays and then installed windows.

I might not be following correctly.

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LVL 7

Author Comment

by:roycasella
ID: 41772971
Setting host bios to UEFI means I cannot boot from USB and this server does not have a DVD. trying to find my external DVD... but thats not been used for some time :(

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LVL 7

Author Comment

by:roycasella
ID: 41772987
And this is because when in UEFI I cannot use my bootable usb because that has been created with Windows 7/USB loader.. and that format must not work as the servers do not boot from it when in UEFI.

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LVL 88

Accepted Solution

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rindi earned 500 total points
ID: 41772991
Check whether you can split your array using your RAID controller. Most of them allow you to split an array into 2 or more separate volumes. That way you can make one of the volume 100GB for the OS, and the other the rest for the data. To the OS those volumes then look like 2 separate disks and so you can create one an MBR disk and boot normally from it, while the 2nd you can have as a GPT disk.
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LVL 7

Author Comment

by:roycasella
ID: 41772997
Just looked and on the H700 in a dell r510 ... to create the array creates the because you must select the disks. I cannot split it into logical volumes once the array is created... unless I can do this via diskpart and specify sizes maybe etc... little stuck

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LVL 88

Expert Comment

by:rindi
ID: 41773001
No it must be a function of the RAID controller. You can't do it in diskpart. Recheck with your management utility whether you can split the array into two volumes.
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LVL 7

Author Comment

by:roycasella
ID: 41773005
Yep done it... just being a divvy as I tired ...

K so created a 100GB.
And also a 2600GB.

So I guess I will flick back to BIOS not UEFI.. build on the 100GB parition.

Then when in Windows / or setup... convert to gpt ... on the 2nd vol.. and then get the whole lot.. and I can also leave the BOOT in bios i guess as I do not need UEFI for boot??

Thanks

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LVL 88

Expert Comment

by:rindi
ID: 41773015
If you really can't find such an option with your controller (but I strongly suggest you look again, as that would be my recommendation for the setup), create the USB stick using the following tool:

http://www.winsetupfromusb.com/downloads/

Make sure that you format it with FAT32, as that is required if you want to boot in EFI mode. If your iso is larger than 4GB, it can split it into parts so that it still fits on the stick.

As far as I know your server includes the Lifecycle Controller. Use that to set it up. Maybe you can split your array in that tool. Besides that, you should be able to use the iso file directly from a network location to install the OS using that controller, you shouldn't need to boot it using a USB stick or DVD.
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LVL 88

Expert Comment

by:rindi
ID: 41773017
Yes, leave in BIOS mode.
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LVL 7

Author Closing Comment

by:roycasella
ID: 41773026
Exactly what I wanted to do.
But could not see the wood for the trees. Over thinking!!!

Many thanks Rindi.. Perfect answer

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