Here are a couple of pointers to perform an installation of OpenBSD on a media which will be read-only most of the times. I hope I didn’t forget anything otherwise I’ll be in trouble next time I reinstall… 🙂



fstab

$ cat /etc/fstab /dev/wd0a / ffs ro,noatime,softdep 1 1 /dev/wd0d /mfs_backup ffs ro,nosuid,noatime,softdep 1 2 swap /dev mfs rw,nosuid,-P=/mfs_backup/dev,-i=128 0 0 swap /var mfs rw,nodev,nosuid,-P=/mfs_backup/var 0 0 swap /home mfs rw,nodev,nosuid,-P=/mfs_backup/home 0 0 swap /root mfs rw,nodev,nosuid,-P=/mfs_backup/root 0 0 swap /tmp mfs rw,nodev,nosuid 0 0 /dev/wd0f /files ffs rw,nodev,nosuid,noatime,softdep 1 2 /dev/wd0e /usr ffs ro,nodev,noatime,softdep 1 2 $

Sync script back MFS to CF

$ cat /bin/mfs-sync.sh #! /bin/sh RSYNC=/usr/local/bin/rsync mount -o update,rw /mfs_backup for i in var root home do echo "Sync'ing " ${i} ${RSYNC} -a --delete /${i}/ /mfs_backup/${i}/ done mount -o update,ro /mfs_backup $

add this into /etc/rc.shutdown

[...] # Add your local shutdown actions here. echo "Sync'ing mfs to disk" /bin/mfs-sync.sh echo '.'

and into the root crontab :

[...] # do daily/weekly/monthly maintenance 00 1 * * * /bin/sh /bin/mfs-sync.sh [...]

Well, I guess that’s about it !





