If you need something which can withstand some bitrot on single drive, just use par2. As long is filesystem is readable, you can recover files even if bit of data get corrupted

It means you published 8080. Just stop doing it. nginx can reach that container via internal network (assuming they are on same network). Publishing docker-compose would help.

Just a hdd in usb caddy? IMHO good enough for 4 tier backup.

just a normal PC? Streaming should work in a browser.

Just a folder + syncthing. no extra infra is necessary + easy to backup.

Get yourself some old cisco 3600 re-flash it with standalone firmware and get enterprise class WAP for cheap.

yes, is what i get reading about that server backplane. NVME part will need another “controller”

what is wrong with old good LSA 2008 based HBAs with SAS-to-Oculink cable? and for NVMe part, adapter is just port format converter, pick any.

With raid 10 - i would not risk it . With RAID6 ( obviously not on BTRFS) it is fair game if you have solid return policy for drives which are DOA. Go for SAS drives, they are cheaper (but generally hotter and nosier). And look for old-new-stock on specialized sites, no one in enterprise needs say 8tb drives, so they selling them cheap at times.

Get drive, connect , run long smart self-test ( for 18tb it is probably take a day). If it passed you are reasonably sure that it will not die soon. And keep running these test regularly, as soon as they start failing, replace.

ZFS or BTRF mirror will know which side is at fault due to checksums. I’m more concern about simultaneous falures of two disks. Rebuilding of a RAID puts lots of pressure on remaining disks, so probability that remaining one dies too is much higher. with RAID6 3 disks need to die to lost date, which is less likely but not impossible.

I would not trust these kind of dives in the mirror. IMHO RAID6 is the only way.

LE only certify your domain name, you may want to put more (like company name) to cert and it is where classic certs providers come to help.

ZFS ZIL will not help in this case.

Usually it can be solved by talking to hotel stuff. you are paying for that service and can expect it be suitable for any legal use.

Symphonium is another good mobile client.