Just to complete this: As said, it is not a good idea to leave the root file system of the Raspberry, which is on an SD card, writable for heavy-duty, long-ter

Just to complete this: As said, it is not a good idea to leave the root file system of the Raspberry, which is on an SD card, writable for heavy-duty, long-term tasks where reliability is important. It is not made for that. Among other things, this includes logging. Instead, I am using this script: https://github.com/fitu996/overlayRoot.sh https://github.com/fitu996/overlayRoot.sh which mounts an overlay-filesystem with the bottom layer being the root-fs, the upper layer a new fs on writable media, which is a RAID partition in my case, and swaps the overlayfs with the root fs. That means that from then, the sd card of the Raspberry is not modified, and all changes go to the RAID disk. If you want to modify the system configuration, you need to re-boot with a different kernel parameter, which is detailed on the linked page.