Cannot Allocate Disk Space on Fujitsu Server RAID 5 Configuration

Hi,

I am from installing Windows Server 2012 R2 on a Fujitsu Primergy TX300 S8 server.
This server has 8 x 4TB hard disks which I configured as RAID5. In the disk management it shows a total of about 21TB and I was able to create two partitions of about 1TB each where  I loaded the OS and the other partition for Exchange Server.
The challenge is that am unable to allocate the remaining space for use. When I right click the functions to enable disk allocation they are greyed out. Kindly see the screen shot.
I need help with this one.

Thanks,
Francis.
Disk-configuration.JPG
fbandaAsked:
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Seth SimmonsSr. Systems AdministratorCommented:
that's because the drive is MBR which only allows the first 2tb
you need to have the disk as GPT then you can use the entire disk
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fbandaAuthor Commented:
Hi Seth,

Seeing that I have already installed the OS can I convert the unallocated partition as GPT?
If so how do I go about it.

Thanks,
Francis
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Seth SimmonsSr. Systems AdministratorCommented:
you will need to reinstall windows
and it's not the partition, it's the entire drive that is either MBR or GPT
if you right-click on disk 0 you can see the convert to GPT option disabled; it's at the disk level, not partition
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fbandaAuthor Commented:
hi

Alright I will do as advised and get back to you.

thanks.
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fbandaAuthor Commented:
Hi Seth,

Am still hitting my head against the wall.
What I need is to have four partitions out of the 21TB (this has been created after running the RAID configuration consisting of 8x4TB SAS hdds) as follows:

500GB for the OS, 500GB for the applications, two 10TB partitions for storage.
I have used diskpart to change the drive to GPT and that seems to accept the command but when I start installing Windows (Server 2012 R2) the drive appears to lose the property for GPT and thus I cant create the partitions.

I hope you understand what am trying to achieve.
\
Thanks.
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Seth SimmonsSr. Systems AdministratorCommented:
are you booting UEFI?
if not, it won't work correctly as GPT
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fbandaAuthor Commented:
Hi,

I am not able to locate the UEFI settings in BIOS. That's another challenge an facing.
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fbandaAuthor Commented:
Hi

I did a RAID 5 configuration on the Fujitsu server and was able to partition the logical drive(26TB)  in Windows Server 2012r2  using diskpart to convert the disk to GPT sothat I could allocate the whole partitions as requited.
And I partitioned as follows:
2 x 1TB, 2x 10 TB (there are four partitions plus two more partitions that windows automatically created).
I managed to run setup onto one of the 1TB partitions and completed successfully, however, upon finishing installation and rebooting, the machine wont boot up. it shows the error "Windows failed to start. A recent hardware or software change might be the cause. To fix the problem:
1. Insert your windows installation disk and restart your computer
2. Choose your language settings, and then click "next."
3. Click repair your computer
 
There are two option on the bottom of the screen as follows:

Option 1 Enter=OS Selection, Option 2 ESC=UEFI Firmware settings.

The challenge is that I don't know how to change the UEFI firmware settings on the machine (Fujitsu Primergy TX300 S8)
I think that could be the cause for the machine failing to boot up.

Your help will be greatly appreciated.

Thanks.
Francis
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fbandaAuthor Commented:
Hi,

I managed to find the UEFI setting on the server and all is well now.

Thanks.
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Seth SimmonsSr. Systems AdministratorCommented:
ok great
not familiar with fujitsu servers so wasn't sure how to configure UEFI but that (and GPT) was definitely causing the 2tb boundary
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