diff -ru udev-182.orig/rules/60-persistent-storage.rules udev-182/rules/60-persistent-storage.rules
--- udev-182.orig/rules.d/60-persistent-storage.rules	2012-02-23 16:26:16.000000000 +0100
+++ udev-182/rules.d/60-persistent-storage.rules	2012-05-24 11:23:01.000000000 +0200
@@ -16,6 +16,8 @@
 SUBSYSTEM!="block", GOTO="persistent_storage_end"
 KERNEL!="loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*|ubi*|scm*|pmem*|nbd*|zd*", GOTO="persistent_storage_end"
 
+KERNEL=="ploop*", GOTO="persistent_storage_end"
+
 # ignore partitions that span the entire disk
 TEST=="whole_disk", GOTO="persistent_storage_end"