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I have two 4TB brand new SHDD built as a Raid-1 array on an (old) nVidia Raid controller.

After having upgraded the Bios, the 4TB drives are recognized as such by the Raid Bios, and I can create a Raid-1 array with the nVidia Mediashield Bios interface.

However, once the raid-1 is built, it displays a 2TB global capacity.

In Windows 10, it also shows 2 TB capacity, although being GPT.

Booting on gParted, the nVidia disk is recognized as 4TB, which sounds nice. However, gParted froze when I tried to format it as NTFS.

I don't really understand where the problem actually is... Would you have any insights to help me?

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  • Sounds RAID controller related given ".. it displays a 2TB global capacity". Contact the manufacturer and see if the MB is doing something goofy that is fixable?
    – Damon
    Jan 29, 2016 at 17:38
  • Verify the RAID controllers maximum disk specification.
    – Ramhound
    Jan 29, 2016 at 19:18
  • Indeed, I updated the option ROM of the BIOS so that the disks are displayed 4TB. As The array shows 4TB in LInux, I suppose this is not BIOS related (even if it displays 2TB). However, I can't find any solution with Windows. In the meantime, I gave up the hardware RAID approach, and chose the windows-based software RAID. I suppose I'll come back to the more efficient hardware solution when I have more budget.
    – Yako
    Jan 30, 2016 at 20:30

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