I suggest browsing the forums and reading a few threads. You can also do the tutorial. We need to get your forum trust level up so you have more posting rights, like images, etc.
TrueNAS-Bot
Type this in a new reply and send to bring up the tutorial, if you haven’t done it already.
@TrueNAS-Bot start tutorial
What is the make and model of the HBA?
Please read the ZFS Primer to understand the terminology and the SLOG you added. It is useful only in special circumstances.
We will need detailed hardware listing.