Why doesn't Raid 10 see the 2nd volume in Windows Server 2012?

Question

Windows Server

Good day to all!
There are:
- mother asrock h77 pro4 / mvp
- 4 SSD disks of 128 GB combined in RAID 10
- Windows Server 2012 Essentials
When installing the system, 66 GB was given to the system, the rest was left for files. But after installation, Windows does not see 2 volumes, only the first one (drive C). In disk management, the second volume is also not displayed, although the total volume of disks is 256 GB.
It was possible to see partition 2 only by running diskpart.
What am I doing wrong?

Answer 1

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