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New WD 3TB Green - can't use more than 2TB

post #1 of 14
Thread Starter 
Hi!

I got a WD Caviar Green 3TB drive last year but didn't install it till a few days ago. Now the problem is that the HDD won't allow me to create all the space into drives. Only 2TB can be formed into a drive, but the rest remains as Unallocated Space.



What do I have to do to use the rest of the 746 GB? I have not stored anything in the other 2TB yet, if it helps.

I should note that I have my CPU overclocked (4.3GHz @1.2v) but stability has not been tested for more than one hour with Prime95.

Thanks a lot for your help! I really appreciate your taking the time to help me! smile.gif
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post #2 of 14
The problem is the drive is initialized as a legacy MBR disk which only supports a 2TB addressable space. In order to gain access to the full 3TB you must initialize the disk as a new GPT disk.
You can do this at the command line (pressing ENTER after each line):
Code:
# diskpart
# list disk
# select disk <disk number>
# clean
# convert gpt

WARNING: This will erase the contents of the disk so if you have anything on it, BACK UP first.
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post #3 of 14
Thread Starter 
Quote:
Originally Posted by tompsonn View Post

The problem is the drive is initialized as a legacy MBR disk which only supports a 2TB addressable space. In order to gain access to the full 3TB you must initialize the disk as a new GPT disk.
Thanks for the quick reply! smile.gif

How do I initialize the disk as a new GPT disk?
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post #4 of 14
Quote:
Originally Posted by ahnafakeef View Post

Thanks for the quick reply! smile.gif

How do I initialize the disk as a new GPT disk?

I edited my post to add that smile.gif

You can then use disk management to partition the volume after converting to GPT.
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post #5 of 14
Quote:
Originally Posted by ahnafakeef View Post

Thanks for the quick reply! smile.gif

How do I initialize the disk as a new GPT disk?

The easiest way to do this as you don't have anything stored on the drive yet would be to reformat the drive as a GPT drive in disk management.
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post #6 of 14
Quote:
Originally Posted by VindalooJim View Post

The easiest way to do this seeing as you do not have anything stored on the drive yet is to reformat the drive as a GPT drive in disk management.

You can't "reformat" to GPT: GPT is not a file system. However if you wanted to use the GUI rather the CLI then you need to delete all partitions on the disk and convert it to GPT using the "Convert to GPT" menu option (I would assume this is what you meant, however it is not the same amount of steps as reformatting).
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post #7 of 14
OP here is a great guide that you should find useful- it shows both disk management "GUI" and Command Prompt "CLI" methods. IMO just do it in disk management.

http://www.sevenforums.com/tutorials/26193-convert-mbr-disk-gpt-disk.html
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post #8 of 14
Thread Starter 
Quote:
Originally Posted by tompsonn View Post

You can't "reformat" to GPT: GPT is not a file system. However if you wanted to use the GUI rather the CLI then you need to delete all partitions on the disk and convert it to GPT using the "Convert to GPT" menu option (I would assume this is what you meant, however it is not the same amount of steps as reformatting).
I would prefer using GUI to carry out the operation, if possible.

I have deleted all partitions from Disk Management (although it shows two different blocks of unallocated spaces). Under which menu is "Convert to GPT" located?

Thanks a lot! smile.gif

EDIT: Found it!
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post #9 of 14
Quote:
Originally Posted by ahnafakeef View Post

I would prefer using GUI to carry out the operation, if possible.

I have deleted all partitions from Disk Management (although it shows two different blocks of unallocated spaces). Under which menu is "Convert to GPT" located?

Thanks a lot! smile.gif

The menu option is available by selecting the disk itself. The link posted above shows the correct spot.
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post #10 of 14
Thread Starter 
Quote:
Originally Posted by tompsonn View Post

The menu option is available by selecting the disk itself. The link posted above shows the correct spot.
Done! smile.gif

Now when I proceed to create a new NTFS drive, there is an option that asks me to define "Allocation unit size" and whether I want to enable "File and folder compression". What should I select for these options?

Thanks a lot! smile.gif
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