2 drives failing to detect on first boot

[brianpugh]

Hi,
     I'm running Windows 10 Pro and using an ASUS Rampage IV Formula Motherboard.



I have two secondary internal drives that are not showing up (even in partition manager) on the first boot but then when I reboot they are detected. (see screenshot attached)


Do I need, or if I don't how to I get ride of the System Reserved 100MB files and 450MB unallocated files on my primary drive? Also, are there any other active or non-active things I need to change on my drives?


Please help.

Thanks!

I didn't find the right solution from the Internet.

References:
www.cnet.com/forums/discussions/2-drives-failing-to-detect-on-first-boot-but-detect-on-2nd/


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