I look forward to more ARM boards getting mainline kernel support for exactly this reason. > Better buy a RPi4 with a NAS Hat Do you know of such a HAT that d

I look forward to more ARM boards getting mainline kernel support for exactly this reason. > Better buy a RPi4 with a NAS Hat Do you know of such a HAT that does USB-attached SCSI Protocol correctly and reliably, and passes through SMART reporting without meddling, and doesn't inappropriately spin down the disks under its control? I wouldn't mind bookmarking such a thing if it exists. I considered the RPi for a recent NAS build, but I didn't want the higher CPU load imposed by a USB-to-SATA bridge (as compared to native/PCIe SATA), nor did I want to play chipset roulette looking for a SATA bridge free from the problems I mentioned above. I ended up using a RockPro64 with a Marvell 88SE9235 PCIe SATA card. It works well, and boots mainline Debian with no vendor blobs. Assuming the electronics don't wear out, I expect it will continue to run fully-updated linux for a long time to come.