Without further ado, the following was found: Issue: udevd → B<systemd-udevd>(8) "B<sfdisk> uses B<BLKRRPART> (reread partition table) ioctl to make sure that " "the device is not used by system or other tools (see also B<--no-reread>). It" "\\(cqs possible that this feature or another B<sfdisk> activity races with " "B<udevd>. The recommended way how to avoid possible collisions is to use B<--" "lock> option. The exclusive lock will cause udevd to skip the event handling " "on the device."