Offtopic question now that you mentioned running a Linux NAS... Which hardware are you using? Because I'm interested in building a home NAS but I don't seem to find any small box ready to hold several disk that isn't ridiculously expensive.
https://www.fractal-design.com/products/cases/node/node-304/...
ZFS is the hero here. I tried many solutions in the past (mdadm on ext, btrfs, XFS, hardware RAID) and got burned by rotten bits and confusing UX leading to user error data loss. But in the past 7 years running ZFS I haven’t lost a single bit, and been continuously impressed with the incredibly easy to use CLI and “intelligence” of the file system itself. Snapshots, send/receive, datasets, everything is just so well refined. It felt ahead of its time a decade ago, and still does today. Moving the file system from Linux to the FreeBSB based TrueNAS was effortless.
The older Gen8 boxes Just Work.
With FreeBSD, the newer Gen10 boxes would hang the first time you boot, you need to pause it and set the hw.pci.realloc_bars loader variable to 1. Haven't tried a new install recently. Details here: https://www.virten.net/2017/10/fix-for-freenas-on-hpe-micros...
The case was $120CAD, and the mobo/cpu/ram (i3) were another maybe 300.
Caveat: I’m not running ZFS, and just do classic “data lives in two places on-site and one off-site” backup
It's not the cheapest, but has idrac "remote control bios". So I never have to sit next to the box. It houses 4 disks + you can add SSDs via PC and it has ECC RAM. Plus I added a couple of years "Next business day on site" warranty, so I'm pretty safe against long downtimes.
Instead, I’d recommend getting a µATX tower with sound dampening preinstalled. The extra interior space also makes installation and maintenance a lot easier.