During some disk operations on an OSD, such as when creating a new disk or when zapping a disk, an error appears in the syslog indicating that a file could not be found. For example:

systemd-udevd: error: /dev/sde2: No such file or directory
 systemd-udevd: inotify_add_watch(7, /dev/sde2, 10) failed: No such file or directory

This error appears due to the asynchronous behavior of partition creation and the triggered udev event. The udev event is triggered while the disk partition is still in the process of updating but has not yet completed. The error is harmless and can be ignored, as the OSD operation completes correctly.

(Bug 24716988)