Recognizing only 800GB of 3TB

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Jesse Hall

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Apr 9, 2014
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I have a USB Seagate 3TB Desktop drive that I want to use as internal. USB Connection recognizes the full drive, but when connected to internal SATA, it sees 2 partitions totalling 800GB. What might I be doing wrong?
 
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jimmysmitty

jimmysmitty

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Oct 5, 2007
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Check the disk manager and make sure it is showing up as only 800GB. This sounds like the very common issue of it being formatted as a MBR disk. MBR can only do partitions of up to 2TB, so anything higher than that gets split into two partitions and with 3TB it is normally 2TB and 800GB partitions. You need it to be formatted as GPT in order for it to show as one disk larger than 2TB.

http://www.sevenforums.com/tutorials/26193-convert-mbr-disk-gpt-disk.html

Try that and see if it helps.
 
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cin19

cin19

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Mar 14, 2011
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It is the 2.2TB limit. Also you may like the seagate website said " If your system uses the Intel RST driver, your 3TB disk drive may appear to be 800GB. See our support article about the Intel RST driver". http://www.seagate.com/support/downloads/beyond-2tb/

You can try use the seagate DiscWizard V13 to see you can solve it or not. http://knowledge.seagate.com/articles/en_US/FAQ/218619en?language=en_US
 
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Solution
J

Jesse Hall

Reputable
Apr 9, 2014
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0
4,510
Thank you all! I tried the MBR to GPT in just the Disk Management and it stayed at 800. I then did the Seagate DiscWizard V13 and let it initialize as GPT, and retrieved the full drive capacity. I appreciate the time everyone had spent to help!
 
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