Execute udevadm settle before trying to import pools. Otherwise the
disk device nodes may not be ready before import time. This is
analogous to the behavior of the init scripts and systemd units.
Signed-off-by: Gordan Bobic <gordan@steel.shatteredsilicon.net>
Signed-off-by: Pavel Snajdr <snajpa@snajpa.net>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes#3213
7b4536c710