30-Drive Storinator Cache setup for Dave's Garage

Instead of an L2ARC, maybe consider a ZFS Metadata Special Device: Z . It essentially moves all of your metadata onto (ideally a mirrored pair) of SSDs.

With 16 drives you have a high chance of a second (or third) drive failure when you’re resilvering after an initial drive failure. I’d split those 16 drives into two RAIDZ2 pools of 8 drives, or switch to RAIDZ3. You may also want to consider a hot-spare.