iotests/124: Add cluster_size mismatch test
If a backing file isn't specified in the target image and the cluster_size is larger than the bitmap granularity, we run the risk of creating bitmaps with allocated clusters but empty/no data which will prevent the proper reading of the backup in the future. Signed-off-by: NJohn Snow <jsnow@redhat.com> Reviewed-by: NFam Zheng <famz@redhat.com> Message-id: 1456433911-24718-4-git-send-email-jsnow@redhat.com Signed-off-by: NJeff Cody <jcody@redhat.com>
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