prevents system from boot when disk in inserted

[kapitainsky]

I have tried this approach (with systemd and 99 rues) on raspberry pi and it works perfectly but when USB disk is inserted it hangs during reboot (soft and hard) - any idea why it might be? I spent a lot of time trying to figure it out but no luck.

[bobhy]

I'm having similar experience with another small system. In my case if the USB disk is plugged in when I boot up, the boot fails and I end up in emergency mode. First error was something about udev timeout waiting for usb-mount.sh. I don't see any log messages from usb-mount.sh itself (but could have missed them!)
As noted above, if I'm careful to leave the device unplugged till the system is up, I can plug it in then and it will mount reliably.

[pejobo]

I can provide a boot log (excerpt):

$ journalctl -b
Apr 25 01:53:59 pi3 kernel: audit: type=1130 audit(1587772439.409:6): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-journal-flush comm="systemd" exe="/usr/lib/systemd/sys>
Apr 25 01:54:55 pi3 systemd-udevd[279]: sda1: Spawned process '/bin/systemctl start [email protected]' [286] is taking longer than 59s to complete
Apr 25 01:54:55 pi3 systemd-udevd[274]: sda2: Spawned process '/bin/systemctl start [email protected]' [287] is taking longer than 59s to complete
Apr 25 01:54:55 pi3 systemd-udevd[271]: sda1: Worker [279] processing SEQNUM=1654 is taking a long time
Apr 25 01:54:55 pi3 systemd-udevd[271]: sda2: Worker [274] processing SEQNUM=1655 is taking a long time
Apr 25 01:55:22 pi3 systemd[1]: dev-mmcblk0p1.device: Job dev-mmcblk0p1.device/start timed out.
Apr 25 01:55:22 pi3 systemd[1]: Timed out waiting for device /dev/mmcblk0p1.
Apr 25 01:55:22 pi3 systemd[1]: Dependency failed for /boot.
Apr 25 01:55:22 pi3 systemd[1]: Dependency failed for Local File Systems.
Apr 25 01:55:22 pi3 systemd[1]: local-fs.target: Job local-fs.target/start failed with result 'dependency'.
Apr 25 01:55:22 pi3 systemd[1]: boot.mount: Job boot.mount/start failed with result 'dependency'.
Apr 25 01:55:22 pi3 systemd[1]: dev-mmcblk0p1.device: Job dev-mmcblk0p1.device/start failed with result 'timeout'.

This is from an arch linux installation on raspberry pi. Wall clock time isn't accurate. mmcblk0p1 is the boot partition. sda is a usb stick plugged in during boot.

Maybe Type=forking is a fix for this? At least this is used here: https://github.com/Ferk/udev-media-automount.

[dzurikmiroslav]

I have same issue during boot, solved adding --no-block option for systemctl

RUN+="/bin/systemctl --no-block start usb-mount@%k.service"