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New 4TB drive only registering 2 TB once installed

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August 15, 2013 8:13:39 AM

I just installed a new 4TB HDD in my XPS 410. Now when I look at the drive it is only registering about 2 TB. Is there anything that can be done to allow the entire disk to be used. I am running WIN7.
a b G Storage
August 15, 2013 8:19:09 AM

The motherboards I have been using the past couple of years (ASRock) came with a 3TB+ Unlocker on the disc. I have only run a few disks 3TB and over, but I think it may be formatted differently too.
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a b G Storage
August 15, 2013 8:36:31 AM

Yep, you need GPT. Bejusek is right.
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August 17, 2013 7:39:23 AM

kushvyas said:
Yap This video may help you as it has same problem it shows 2tb only , watch the video and hope it helps:
https://www.youtube.com/watch?v=NHAIDprjmYo


I tried this and it will only see about 2 TB. I am only using this drive as a data storage. Could it be my mother board? I have tried just about everything I can find for Win7.
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Best solution

a b G Storage
August 18, 2013 8:27:28 PM

As mentioned above, the problem is caused by the disk style - MBR. Under MBR, you can only use disk space at most 2TB. To use disk space larger than 2TB, you need to use GPT disk. Therefore, you need to convert MBR to GPT disk.

Solution (available for empty HDD): Open Windows 7 Disk Management -> Right click the 4TB Disk -> select "Convert to GPT".

However, if there are data on your HDD, you need to backup data and delete all partitions.
Free Backup and Restore Tool: http://www.backup-utility.com/free-backup-software.html.

The other way: Convert MBR to GPT disk without deleting the existing partitions with free partition manager: http://www.youtube.com/watch?v=hlYjNbiVB-0
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