Unmounting /media/usb fails during shutdown if udev is running
Attachments show two cases:
unmounting_with-udev: udev (and udev-trigger) was previously started
in the sysinit runlevel.
unmounting_without-udev: udev (and udev-trigger) was stopped before
shutdown.
Installed udev packages:
udev-init-scripts-32-r2
udev-init-scripts-openrc-32-r2
eudev-libs-3.2.7-r0
eudev-3.2.7-r0
/proc/mounts: https://pastebin.com/hzvQirkg
(from redmine: issue id 10525, created on 2019-05-31)