test: check we can process files which aren't whole sectors in size
test: check we can process files which aren't whole sectors in size

Signed-off-by: David Scott <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@recoil.org>

samoht/mirage-block-unix,mirage/mirage-block-unix,djs55/mirage-block-unix