QEMU iotest 211 is failing for me, too, when I run it with -vdi: tests/qemu-iotests$ ./check -vdi 211 QEMU -- "/home/thuth/tmp/qemu-build/tests/qemu-iotests/../../x86_64-softmmu/qemu-system-x86_64" -nodefaults -machine accel=qtest QEMU_IMG -- "/home/thuth/tmp/qemu-build/tests/qemu-iotests/../../qemu-img" QEMU_IO -- "/home/thuth/tmp/qemu-build/tests/qemu-iotests/../../qemu-io" --cache writeback -f vdi QEMU_NBD -- "/home/thuth/tmp/qemu-build/tests/qemu-iotests/../../qemu-nbd" IMGFMT -- vdi IMGPROTO -- file PLATFORM -- Linux/x86_64 thuth 3.10.0-957.10.1.el7.x86_64 TEST_DIR -- /home/thuth/tmp/qemu-build/tests/qemu-iotests/scratch SOCKET_SCM_HELPER -- /home/thuth/tmp/qemu-build/tests/qemu-iotests/socket_scm_helper
211 - output mismatch (see 211.out.bad) --- /home/thuth/devel/qemu/tests/qemu-iotests/211.out 2019-04-23 16:43:12.000000000 +0200 +++ /home/thuth/tmp/qemu-build/tests/qemu-iotests/211.out.bad 2019-04-28 17:41:19.000000000 +0200 @@ -55,8 +55,7 @@ virtual size: 32M (33554432 bytes) cluster_size: 1048576 -[{ "start": 0, "length": 3072, "depth": 0, "zero": false, "data": true, "offset": 1024}, -{ "start": 3072, "length": 33551360, "depth": 0, "zero": true, "data": true, "offset": 4096}] +[{ "start": 0, "length": 33554432, "depth": 0, "zero": true, "data": true, "offset": 1024}] === Invalid BlockdevRef === Failures: 211 Failed 1 of 1 tests Any ideas how to fix this? Thomas