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[SOLVED] 6TB HDD won't show up even though GPT.

PostPosted: November 9th, 2016, 6:49 pm
I got a Mediasonic Probox HF2-SU3S2, 4 bay- says it's compatible with up to 8TB HDD's. But i cannot get them to show up, I got into Computer Management and the drives have no drive letter assigned and half of the drives are unallocated.
Windows 10 gives no options to allocate drives or assign drive letters. Used Hard Drive Sentinel but don't see anywhere to fix the issue, but says drives are ok.
I inserted a spare 1TB HDD and it shows up no problem. I have a GPT attached to the system that's works no problem. Just don't know what else to do to get this running.

I'm Running Windows 10 64bit
With a Gigabyte Z97MX-Gaming 5 Motherboard
With a Intel Core i7-4790 CPU

Any Help appreciated.

I guess all 3 HDD had half GPT And half MBR, used MiniTool Partition Wizard Free to convert all to GPT. Then created a partition. Surprised Disk Management or Easeus wouldn't let me do that.