cannot extend a volume on windows 2012

I have a windows 2012 server that is running out of space on the F drive, I see that I have 185Gb unused in computer manager and was hoping to extend the volume.
As you can see from the picture, this is grayed out. How can I extend the volume ?
This is running on 6 x 600Gb SAS on a raid 5, 1 of the drives is spare.
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total123Asked:
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andyalderSaggar maker's framemakerCommented:
Does diskpart also refuse to extend it?

DISKPART
list volume
(find volume number, may be 3)
select volume 3
extend
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andyalderSaggar maker's framemakerCommented:
Ignore previous, look at the sizes: 399GB * 1648GB - 2048GB which is the maximum size of a basic drive, you need GPT for disks greater than 2TB. Whoever set it up should have sliced the array in hardware inti two logical disks to keep them below 2TB. You can't just convert to GPT either as it probably won't be bootable.
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total123Author Commented:
well spotted, I take it I can't change it to GPT ?
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noxchoGlobal Support CoordinatorCommented:
You can't convert it to GPT as long as you have partitions on it.
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Hello ThereSystem AdministratorCommented:
I suggest you ti use MiniTool Partition Wizard to do this operation.
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andyalderSaggar maker's framemakerCommented:
What machine is it? You need UEFI to boot GPT,

Don't know if MBR2GPT is available for server 2012, and wouldn't gamble on 3rd party partition tools without full backup.
https://www.windowscentral.com/how-convert-mbr-disk-gpt-move-bios-uefi-windows-10
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noxchoGlobal Support CoordinatorCommented:
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Hello ThereSystem AdministratorCommented:
MBR can work with larger drives, it just can't have a single partition of more than 2TB.
I suggest you to use MiniTool Partition Wizard...

See this thread on EE: https://www.experts-exchange.com/questions/29076775/Cannot-extend-or-create-volume-in-Unallocated-Space-Server-2012.html
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andyalderSaggar maker's framemakerCommented:
@Hello There,

MBR can't give access to space past the 2TiB boundary. It's a physical limit.
https://support.microsoft.com/en-gb/help/2581408/windows-support-for-hard-disks-that-are-larger-than-2-tb
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Hello ThereSystem AdministratorCommented:
Sorry for misleading info. Taking it back...
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total123Author Commented:
thanks for the replies,

the tools you provided by noxcho. do I not have the issue where the MBR is on the partition to start with ?
Meaning I can't increase it anyway ?
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noxchoGlobal Support CoordinatorCommented:
the tools you provided by noxcho. do I not have the issue where the MBR is on the partition to start with ?
Meaning I can't increase it anyway ?
With AOMEI there should not be any problem. Actually what these tools do is a simple operation, I don't know why MS did not enable that converting in Windows as well.
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andyalderSaggar maker's framemakerCommented:
You haven't confirmed that the machine has UEFI yet.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
If the machine was set to UEFI, the hard drive partitions would be different right now. Windows detects if it's BIOS/UEFI at install and sets up the hard drive appropriately.  Systems can be changed from BIOS to UEFI wouldn't boot anymore because the drive wouldn't contain the necessary parititions to boot UEFI unless you reinstalled.  

The most reasonable solution to your issue to add another drive and and move the contents of the existing drive to it.  (that 185 GB will NEVER be usable without wiping and reloading under UEFI or wiping and creating the RAID array making two "containers", one of for the C: drive and one for the data drive).
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total123Author Commented:
its bios

Callback_BootEnvironmentDetect: Detected boot environment: BIOS

I was dreading the idea of wiping, just due to the capacity of data involved. 1.6Tb

thanks Lee
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Sorry, that should read "Systems that can be changed from BIOS to UEFI..." - not all can, but those that can...
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andyalderSaggar maker's framemakerCommented:
Any reason you won't confirm make/model of machine/controller?
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total123Author Commented:
It's a dell T320
PERC H310 raid controller
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Seth SimmonsSr. Systems AdministratorCommented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Split:
-- andyalder (https:#a42455342)
-- andyalder (https:#a42455379)
-- Lee W MVP (https:#a42455477)


If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

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