_pwrite_byte 0x62 0 $((blksz * 2)) $testdir/file2.chk >> $seqres.full
_pwrite_byte 0x61 $((blksz * 2)) $((blksz * 255)) $testdir/file2.chk >> $seqres.full
_reflink_range $testdir/file1 $blksz $testdir/file2 $((blksz * 2)) 0 >> $seqres.full
-_test_remount
+_test_cycle_mount
md5sum $testdir/file1 | _filter_test_dir
md5sum $testdir/file2 | _filter_test_dir