LU-10026 tests: Fix sanity test_56ab for CSDC

Use /dev/urandom in sanity test_56ab so the data cannot be compressed

Test-Parameters: trivial testlist=sanity env=ONLY=56ab

Signed-off-by: Wei Liu <sarah@whamcloud.com>
Change-Id: Ib0108f4507a7b46ad5ca973ef43351e005232edf
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/52572
Reviewed-by: Colin Faber <cfaber@ddn.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>

diff --git a/lustre/tests/sanity.sh b/lustre/tests/sanity.sh
index d057091..7671899 100755 (executable)
--- a/lustre/tests/sanity.sh
+++ b/lustre/tests/sanity.sh
@@ -8535,9 +8535,9 @@ run_test 56aa "lfs find --size under striped dir"
 
 test_56ab() { # LU-10705
        test_mkdir $DIR/$tdir
-       dd if=/dev/zero of=$DIR/$tdir/$tfile.1 bs=8k count=1 seek=2k
-       dd if=/dev/zero of=$DIR/$tdir/$tfile.2 bs=4k count=1 seek=4k
-       dd if=/dev/zero of=$DIR/$tdir/$tfile.3 bs=1M count=2 seek=16
+       dd if=/dev/urandom of=$DIR/$tdir/$tfile.1 bs=8k count=1 seek=2k
+       dd if=/dev/urandom of=$DIR/$tdir/$tfile.2 bs=4k count=1 seek=4k
+       dd if=/dev/urandom of=$DIR/$tdir/$tfile.3 bs=1M count=2 seek=16
        # Flush writes to ensure valid blocks.  Need to be more thorough for
        # ZFS, since blocks are not allocated/returned to client immediately.
        sync_all_data