Unfortunately, the enclosure doesn't work super well on Linux. There is a weird bug where the drives don't enumerate when I boot up my computer. This happens on both my x86_64 AMD machine running Linux, and on the DGX Spark. The solution is... simply power cycle the enclosure a couple of times by toggling the power button on it and then it works. Once all four drives show up in lsblk, I can `sudo zfs import ...` manually. This is really gross and annoying. Replacing the USB cable, flipping the USB-C cable 180 degrees, hot plugging it, etc, all didn't work, both on the DGX Spark and the other Linux machine. I've also read reports of it being unstable in UAS mode on Linux but I haven't found a big difference in stability between enabling UAS or falling back to usb-storage.
Once it starts up correctly though, the drives are fast. I store my huge amount of 100 megapixel photos on it.
The Seagate Barracudas are helium-filled HAMR/CMR drives and are apparently rebranded/binned Exos drives. They aren't rated for 24/7 use but then neither are the refurbished Exos drives.
[1] https://www.reddit.com/r/buildapcsales/comments/1p29pm8/hdd_...