On Sat, Mar 03, 2018 at 07:48:07PM +0000, Thomas Huber wrote: > Hi, > > can someone give me a recomendations for ffs mount options or further > tuning to prevent file-system corruption on power-outage? > > I run a PC-Engines APU2c3 with -stable in a rural place where power-outage > takes place approx. once a month. Most of the time every things starts fine > when power is back, but sometimes (now the third time in one year) I end up > with an corrupted /var and I´ve to go to that place and do manual fsck_ffs > which could always repair the fs. > I already tried with the softdep option but it didn´t prevent fs-corruption. >
Don't use softdep, that will just make things worse > $ mount > /dev/sd0f on /var type ffs (local, nodev, nosuid) If you can, some parts of /var can be mounted read-only. If you have a webserver under /var/www and it doesn't write anything, add that as a seperate partition and mount it ro. The log files can be somewhere else than /var/www/logs. (I am correct about that, right? Wrong?) You could as break up /var directories into different partitions, still rw, but less evil to lose a directory versus the whole /var partition. I always tend to use up all the possible partitions and ro everything I can. mount -u -o rw..... is nice. Trust me. manual fsck does fail sometimes. Then there is a big mess to fix up. Losing /var is a very nasty one to fix. Been there, done that! And getting a UPC is a good idea, unless you're outside doing something and the battery fails. Never had a UPC, always needed one in some places. May all the rest of your days been filled with never failing power! Chris Bennett
