UPDATED ISSUE
So after more testing, pushing and pulling hardware from the machine, it seems that there is some sort of HDD limit. If I have 11HDD +1usb flash drive it will boot, add even 1 more drive and it is not able to find the boot media.
I am glad it is not an issue with unRaid, however I am scratching my head even more now.
Not really sure this issue relates to this area of the forums anymore.
(HARDWARE)
Areca ARC-1882IX-16
Firmware VersionV1.55 2018-03-23
BOOT ROM VersionV1.55 2018-03-23
PL Firmware Version19.0.0.0
System Information:
M/B: Supermicro - X8DT3-LN4F
BIOS Revision:2.2
CPU: Intel® Xeon® CPU X5650 @ 2.67GHz
Memory: 48 GB Multi-bit ECC (max. installable capacity 384 GB)
Kernel: Linux 4.18.17-unRAID x86_64
3u Supermicro Chassis with 16 Hot swap bays.
Can post LOGS or screenshots if necessary.
Thanks.