--- /dev/null
+#!/bin/bash -x
+
+set -e
+
+ceph mds set allow_new_snaps true --yes-i-really-mean-it
+
+echo 1 > file1
+echo 2 > file2
+echo 3 > file3
+[ -e file4 ] && rm file4
+mkdir .snap/snap1
+echo 4 > file4
+now=`ls`
+then=`ls .snap/snap1`
+rmdir .snap/snap1
+if [ "$now" = "$then" ]; then
+ echo live and snap contents are identical?
+ false
+fi
+
+# do it again
+echo 1 > file1
+echo 2 > file2
+echo 3 > file3
+mkdir .snap/snap1
+echo 4 > file4
+rmdir .snap/snap1
+
+rm file?
+
+echo OK
\ No newline at end of file