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in BIOS , UEFI Boot is enabled , ACHI Mode is selected , and the 3TB Hard disk (Seagate ST30000DM001) is installed at SATA Port 3.

However, in Windows 7 64-bit, 3TB hard disk is displayed as 746GB, no matter how do I format or set the settings. I use GPT as partition table ( as suggested by Windows , > 2TB should use GPT ).

How can I get back the full 3TB storage ?

p.s. Motherboard is Intel DH55HC and Intel Rapid Storage Technology software shows the disk capacity is 2.862GB .

p.s. Operating System is Windows 7 Ultimate , 64-bit

UPDATE Somebody marked this question as a duplicate of similar issue with USB closure. But this question is about hard disk directly attached to motherboard via SATA cable.

Raptor
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2 Answers2

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This problem is resolved in my 10 years old HP desktop (4 cores), with drive: 3TB Western Digital Green, but it should be the same with Seagate too.

In a nutshell you need 2 things to do:

  • to install the Intel RAID driver (free).
  • to use a good tool for extending the partition to the maximum size, like AOMEI Partition Assistant (freeware).

Cheers!

PS1: After all is setup property, you can uninstall both tools mentioned above.

PS2: If you have any conflict between the new 2TB or 3TB disk and the old DVD-ROM then disconnect the DVD, and get an external one (my case).

Sorinel C.
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At last, I found that I have to install Seagate DiskWizard to enable the full 3TB disk space.

Note: The software will erase all the contents of the 768GB.

Download link of Seagate DiskWizard : http://www.seagate.com/support/downloads/beyond-2tb/

Raptor
  • 1,140