On 2025/09/04 15:14, Tom Smyth wrote: > The biggest issue I have seen is where you have a chatty daemon > talking to /var/log we find that wears out the flash quite > quickly... and the probabilty it will be writing to disk during a > power event was approaching 100% > > so I wanted to reduce the probability of a write to the disk during > a power event (as a lot of these devices are in less than ideal > locations beside users / customers even :) and without any power > backup / conditioning ...
fwiw, though I mostly stopped using openbsd on that type of device anyway, for the ones that still remain I normally use syslog's memory buffer logging for anything chatty, but keep mounting /var/log as normal and have more important things written there. this can help when I'm diagnosing a failure (there's a higher chance of a log entry getting to disk if it doesn't rely on e.g. rsync in rc.shutdown). (for those, I also modify /etc/rc to force -y for fsck, disable library_aslr, and "chmod 000 reorder_kernel" in rc.local so that it's disabled in normal conditions but easily reenabled if needed)
