It seems like tinyIPA silently replaces /dev/md/esp with /dev/md127.
Find the next free /dev/md device and use it instead.
Also rescan the resulting device before copying files.
Change-Id: Ie04f530be434c4b1561e75f387b9da679e4607e0
Depends-On: https://review.opendev.org/c/openstack/ironic/+/827129/