QA output created by 157
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134217728

=== Setting WCE with qdev and with manually created BB ===

Testing: cache='writeback' wce=''
    Cache mode:       writeback
Testing: cache='writeback' wce=',write-cache=auto'
    Cache mode:       writeback
Testing: cache='writeback' wce=',write-cache=on'
    Cache mode:       writeback
Testing: cache='writeback' wce=',write-cache=off'
    Cache mode:       writethrough
Testing: cache='writethrough' wce=''
    Cache mode:       writethrough
Testing: cache='writethrough' wce=',write-cache=auto'
    Cache mode:       writethrough
Testing: cache='writethrough' wce=',write-cache=on'
    Cache mode:       writeback
Testing: cache='writethrough' wce=',write-cache=off'
    Cache mode:       writethrough
*** done