The logging issue was identified, thanks for reporting!
Regarding the upgrade
failure: Was the drive really unmounted via dietpi-drive_manager, respectively fstab entry and/or systemd automount unit removed, or was it detached only so that the systemd automount unit was still active? In this case, when anything is accessing the mount point, systemd tries to mount the drive, which of course fails what it is not attached, freezing the system for 90 seconds timeout. So generally it is good to either unmount the drive via drive manager, when it was also mounted with it, or doing a temporary mount for the backup which does not involve an fstab entry and automount unit:
Code: Select all
mount /dev/sdb1 /mnt/backup
That that I think of it, it would be actually great to have such automatic mount and unmount for backup drives included in dietpi-backup, at least for the daily backup cron job