Comment 2 for bug 1713537

Due to some change in behavior of iscsi, we now trip up over not disconnecting the targets after unmounting them from the target. The disconnect code is call with the target dir path (Which isn't valid any more due to being unmounted). We should definitely umount the targets first (to flush data on the device) but then call disconnect with a path of / to use the config on the ephemeral host (which was copied into the target anyhow).