# mount
/dev/da0s1a on / (ufs, local, read-only)
devfs on /dev (devfs, local)
# mount -ar
# mount
/dev/da0s1a on / (ufs, local, read-only)
devfs on /dev (devfs, local)
/dev/da0s1g on /jails (ufs, local, read-only)
/dev/da0s1d on /tmp (ufs, local, read-only)
/dev/da0s1f on /usr (ufs, local, read-only)
/dev/da0s1e on /var (ufs, local, read-only)
# mount -aur
# mount
/dev/da0s1a on / (ufs, local, read-only)
devfs on /dev (devfs, local)
/dev/da0s1g on /jails (ufs, local, read-only)
/dev/da0s1d on /tmp (ufs, local, read-only)
/dev/da0s1f on /usr (ufs, local, read-only)
/dev/da0s1e on /var (ufs, local, read-only)
# mount -auw
# mount
/dev/da0s1a on / (ufs, local)
devfs on /dev (devfs, local)
/dev/da0s1g on /jails (ufs, local, soft-updates)
/dev/da0s1d on /tmp (ufs, local, soft-updates)
/dev/da0s1f on /usr (ufs, local, soft-updates)
/dev/da0s1e on /var (ufs, local, soft-updates)
# mount -aur
# mount
/dev/da0s1a on / (ufs, local, read-only)
devfs on /dev (devfs, local)
/dev/da0s1g on /jails (ufs, local, read-only, soft-updates)
/dev/da0s1d on /tmp (ufs, local, read-only, soft-updates)
/dev/da0s1f on /usr (ufs, local, read-only, soft-updates)
/dev/da0s1e on /var (ufs, local, read-only, soft-updates)
# mount -uw /usr
# ls /usr
.snap   games    lib      local       share
bin     home     libdata  lost+found  tmp
compat  include  libexec  sbin        wtf
# rm /usr/wtf
# mount -ur /usr
softdep_waitidle: Failed to flush worklist for 0xffffff0003393000
mount: /dev/da0s1f : Device busy
# mount
/dev/da0s1a on / (ufs, local, read-only)
devfs on /dev (devfs, local)
/dev/da0s1g on /jails (ufs, local, read-only, soft-updates)
/dev/da0s1d on /tmp (ufs, local, read-only, soft-updates)
/dev/da0s1f on /usr (ufs, local, soft-updates)
/dev/da0s1e on /var (ufs, local, read-only, soft-updates)
# sync;sync
# mount -ur /usr
softdep_waitidle: Failed to flush worklist for 0xffffff0003393000
mount: /dev/da0s1f : Device busy