Description - Special case how we validate vhd image files. Without this patch when tap:aio:vhd prefixed image files are specified in the config file, disk validation and thus vm creation will fail. IanJ - Since we decided to not merge disk changes patch 3-5, we need this. IanC - This patch has the change you suggested to look for DISK_FORMAT_EMPTY. Signed-off-by: Kamala Narasimhan Kamala