Hard disk volumes are growing - this is a normal phenomenon, so it was unpleasant to face a situation where Windows out of 6 TB saw only 1.5 TB.
However, another is interesting: nowhere is it clearly described how to correct this situation. It is proposed and put GIGABYTE 3TB + Unlock Utility on GIGABYTE motherboards and other actions that have little to do with the problem. The solution was found on the forum, and the chela who found the right solution was pecked.
The solution is to install Intel® Rapid Storage Technology on Intel chipsets.
For example, on the GA-Z77X-UD3H motherboard you need to install this kit or download the latest from the website of the manufacturer of the motherboard.
Further disks are displayed with the correct volume.