+#! /bin/ksh -p
+#
+# CDDL HEADER START
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source. A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright (c) 2018 by Delphix. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/removal/removal.kshlib
+
+#
+# BACKGROUND:
+#
+# ztest hit an issue where it ran zdb and zdb failed because
+# it couldn't access some indirect mappings at the end of a
+# vdev. The issue was that the vdev's ms_shift had changed after
+# it was removed by the addition of another vdev. This test is
+# a regression test for ensuring this case doesn't come up again.
+#
+
+
+TMPDIR=${TMPDIR:-$TEST_BASE_DIR}
+DISK0=$TMPDIR/dsk0
+DISK1=$TMPDIR/dsk1
+DISK2=$TMPDIR/dsk2
+
+log_must truncate -s $MINVDEVSIZE $DISK0
+log_must truncate -s $(($MINVDEVSIZE * 3)) $DISK1
+log_must truncate -s $MINVDEVSIZE $DISK2
+
+function cleanup
+{
+ default_cleanup_noexit
+ log_must rm -f $DISK0 $DISK1 $DISK2
+}
+
+#
+# Setup the pool with one disk .
+#
+log_must default_setup_noexit "$DISK0"
+log_onexit cleanup
+
+#
+# Expand vdev.
+#
+log_must truncate -s $(($MINVDEVSIZE * 2)) $DISK0
+log_must zpool reopen $TESTPOOL
+log_must zpool online -e $TESTPOOL $DISK0
+
+#
+# Fill up the whole vdev.
+#
+dd if=/dev/urandom of=$TESTDIR/$TESTFILE0 bs=8M
+
+#
+# Add another vdev and remove the first vdev creating indirect
+# mappings for nearly all the allocatable space from the first
+# vdev. Wait for removal to finish.
+#
+log_must zpool add $TESTPOOL $DISK1
+log_must zpool remove $TESTPOOL $DISK0
+log_must wait_for_removal $TESTPOOL
+
+#
+# Add a new vdev that will trigger a change in the config.
+# Run sync once to ensure that the config actually changed.
+#
+log_must zpool add $TESTPOOL $DISK2
+log_must sync
+
+#
+# Ensure that zdb does not find any problems with this.
+#
+log_must zdb $TESTPOOL
+
+log_pass "Removal of expanded vdev doesn't cause any problems."