On Fri, 5 Jun 2020, 14:06 Sébastien Luttringer, <seblu@seblu.net> wrote:

Please relax, I've a RAID5 of 6x8TB since years.

Have you had to replace a disk and do a rebuild? https://www.digistor.com.au/the-latest/Whether-RAID-5-is-still-safe-in-2019/

TL;DR: ...the rebuilding successful rate is very low even for 4 bay SATA 5 array with 1TB disks. It’s nearly impossible to guarantee a successful rebuilding with this type of disk because of its too high URE. Another alarming fact about URE is: it has no correlation to the drive’s age.

It's obviously worse with consumer drives compared to enterprise drives - I'm not sure what Hetzner provision though.

(Sorry for the slow reply - been AFK.)