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nikolas.e

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Reply with quote  #1 
On a Windows Server 2008 and 2008R2 the master boot record disk maximum size can be up to 2TB because of the 512 bytes per sector limitation.

So if i had a Server 2008R2 with 3 Disks X 2TB as raid 5 and wanted to create one partition only C: this will result as  c: = 2 TB(the maximum size the OS will see because of the 512 bytes per sector limitation and the rest 2TB unallocated which i cannot use.

Even if i choose to create a partition for the c: as 200 gb i could still use the unallocated space of 1800GB to create another partition but the rest 2TB i could not use since the OS looks at the disk size and not the partition size.


This limitation does not apply when adding disks > 2 TB for storing data correct?


Please correct me if am wrong.


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nikolas.e

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Reply with quote  #2 
This limitation does not apply when adding disks > 2 TB for storing data correct?

Okay i was wrong here since mbr disks supports size up to 2 TB only.  So  lets say i have a raid-1 of  2 X 4TB disks  windows will not let me see more than 2 TB of size if the partition is set as mbr. I will have to convert it to gpt in order to take advantage of the disk full size.


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Mark

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Reply with quote  #3 
Nikolas, may I suggest moving to GPT?  I'm guessing that your hardware supports UEFI firmware and that really IS the standard new platform.  I'm pretty sure that 2008R2 supports it.
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nikolas.e

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Reply with quote  #4 
Quote:
Originally Posted by Mark
Nikolas, may I suggest moving to GPT?  I'm guessing that your hardware supports UEFI firmware and that really IS the standard new platform.  I'm pretty sure that 2008R2 supports it.



Hi Mark and thank you for the reply. Currently our Servers bootable disks are initialized on mbr partition since the disks capacity size is less than 2 TB. The question was informational so when the time comes to upgrade our system to new hardwares(that supports UEFI) and newer Windows OS version i will initialize the bootable disks using GPT partition

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