Edit: /usr/lib/udev/rules.d/70-iscsi-disk.rules (253B)
# When iscsi disks are present, iscsid.service should be running. LP: #1802354
# ID_PATH looks like ip-
:-iscsi--lun-
SUBSYSTEM=="block", ACTION=="add", ENV{ID_PATH}=="*-iscsi-*", ENV{SYSTEMD_WANTS}+="iscsid.service"