Assembled TruNAS, mounted all 18TB drives and write-cache drive
Connected provided ethernet line to non-mgmt port on back of machine, other end to switch behind CC
Booted machine
Logged into trunas.local and used user/pass
Saw that one drive was not being found after login
Storage > Disks
Used `dd if=/dev/ada[0-5] of=/dev/null bs=1M count=5000` where [0-5] is one of the devices listed
Isolated it to ada5 in bay 2. Swapped bay 2 with bay 3 to check if it's the drive or the bay
It's the drive!
Sent email to TruNAS support for a new drive (jacob.chamblee@ixsystems.com)