QA output created by 158
== create base ==
Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728 encryption=on

== writing whole image ==
wrote 134217728/134217728 bytes at offset 0
128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== verify pattern ==
read 134217728/134217728 bytes at offset 0
128 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== create overlay ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT encryption=on

== writing part of a cluster ==
wrote 1024/1024 bytes at offset 0
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== verify pattern ==
read 1024/1024 bytes at offset 0
1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

== verify pattern ==
read 64512/64512 bytes at offset 1024
63 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
*** done