I have had a few without the icepacks for years now. They run so hot and I never built a system to deal with it. Please do a follow up comparing seek and read/write stats with modern fastbois.

1522 all day. QNAP fell victim to multiple ransomware attacks in recent years. They have a lot of work to do to build back trust.

Both are dropping. SSDs used to cost a fucking fuck load!

I think you have environmental issues at play. That failure rate is incredibly abnormal.

IMO you should care more about availability and architecture than what individual drives you want to buy. One backup is no backups.