Let’s begin with the basics:
A description of the hardware, please. And the output of some commands, each as preformatted text[1]:
zpool status -v camcontrol devlist smartctl -a /dev/ada# for each relevant drive
zpool status -v
camcontrol devlist
smartctl -a /dev/ada#
</> button on the tool bar, or paste the output between lines of three backticks ``` your text here ``` ↩︎
</>