From 3fbb7b6e35b12c36838139eb365b526129b63baf Mon Sep 17 00:00:00 2001
From: Zdenek Kabelac <zkabelac@redhat.com>
Date: Tue, 28 Apr 2015 11:32:52 +0200
Subject: tests: always zero disk header

It appear that older wipefs doesn't wipe partition table.
So ensure there is no partition on LVM_TEST_BACKING_DEVICE.
---
 test/lib/aux.sh | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'test')

diff --git a/test/lib/aux.sh b/test/lib/aux.sh
index 1af43d03e..0e59d6e2c 100644
--- a/test/lib/aux.sh
+++ b/test/lib/aux.sh
@@ -497,6 +497,8 @@ prepare_devs() {
 	# non-ephemeral devices need to be cleared between tests
 	test -f LOOP || for d in ${DEVICES[@]}; do
 		blkdiscard "$d" 2>/dev/null || true
+		# ensure disk header is always zeroed
+		dd if=/dev/zero of="$d" bs=4096 count=1
 		wipefs -a "$d" 2>/dev/null || dd if=/dev/zero of="$d" bs=64K count=1
 	done
 
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