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Seagate 3TB only showing 2TB

post #1 of 17
Thread Starter 
Just bought a new 3TB Seagate HDD and slapped a fresh install of Windows 8 on it. To find that only 2TB is showing and that 746GB is unallocated.

Can someone explain why this is and how I can fix it.

Thank you.
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post #2 of 17
Go to Disk Management and check whether or not you can extend the primary partition, if not you may have to format and create a new partition.

Hit start button and type in 'Disk', then click on the create and format disk partitions.

EDIT:

As for why it happened, it's likely that when installing the OS you created a partition that was smaller than the capacity of the entire drive.
Edited by munaim1 - 11/8/12 at 8:08am
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post #3 of 17
In Windows Disk Management, does the partition show as 2TB? Can you extend it?
You may need to reformat it as GPT (GUID Partition Table) rather than MBR (Master Boot Record), MBR is common and only supports 2.2TB
post #4 of 17
Yep, had t do the same thing the other day. I wonder why It leaves It like that...
post #5 of 17
Thread Starter 
I tried to extend but i get a message saying
Quote:
Ohly the first 2TB are usable on large MBR disks

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post #6 of 17
You need to reformat to GPT then, unfortunately. MBR is the problem here.
You can convert too: http://www.sevenforums.com/tutorials/26193-convert-mbr-disk-gpt-disk.html
post #7 of 17
Quote:
Originally Posted by jeffries7 View Post

I tried to extend but i get a message saying
Quote:
Ohly the first 2TB are usable on large MBR disks


As powermonkey explained, you'll have to reformat it as GPT (GUID Partition Table).
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post #8 of 17
Yup, two options: reformat to GPT, our make a second partition.

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post #10 of 17
Thread Starter 
Thanks for all the quick replies, i'll try and convert it first.
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