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HD showing wrong size in Win 7

I added a WD 3tb drive to Win 7 and formatted it as a basic disk. It showed the correct size in Disk Management. Later I realized I needed it to be a dynamic disk so I changed it and now it only shows 746.39gb in disk management. It shows the full size in the BIOS on boot up. Is there any way to reset it back to full size? There is no data on it.
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More about showing wrong size win
  1. Use disk manager, delete all partitions, make a new one that's the full size.

    There are a few issues with disks over 2TB, but unless using an older motherboard it shouldn't be your problem.
  2. Best answer
    You will need to unlock the drive for your motherboard in Windows. There should be a 3TB+ driver for your motherboard on their download page.
  3. menetlaus said:
    Use disk manager, delete all partitions, make a new one that's the full size.

    There are a few issues with disks over 2TB, but unless using an older motherboard it shouldn't be your problem.


    I tried that but disk manager only allows me to create a 746.39gb partition. My motherboard is fairly new and when I first installed the drive it was recognized as 3tb. Now disk manager only sees the drive as 746.39gb but the BIOS sees the whole 3tb.
  4. GP23 said:
    I added a WD 3tb drive to Win 7 and formatted it as a basic disk. It showed the correct size in Disk Management. Later I realized I needed it to be a dynamic disk so I changed it and now it only shows 746.39gb in disk management. It shows the full size in the BIOS on boot up. Is there any way to reset it back to full size? There is no data on it.



    I had the same problem... had my drive for several months trying many "fixes" (updating from vista to windows 7, BIOS updates, every driver I could find etc. before I finally found that the external drive(s) I was trying to use did not support the 3TB size. As a last resort I removed my newer "SIIG" dual drive external from one of the other systems and tried it before shelving the drive indefinitely. I really wasn't expecting it to work but as soon as I turned it on I got a 2794.39 GB reading in my Computer Management. What a relief!
    Hope this helps someone. Good Luck, GoodOlJoe
    GoodOlJoe @ gmail .com
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