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Description
virt-v2v can not convert guest with virtio lun disk 

Version:
virt-v2v-0.9.0-2.el7.x86_64
libvirt-1.0.6-1.el7.x86_64
libguestfs-1.22.2-1.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1.Prepare a guest with virtio lun disk.
# virsh dumpxml virtio-lun
    <disk type='block' device='lun'>
      <driver name='qemu' type='raw' cache='none'/>
      <source dev='/dev/sdb'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>

2.Use virt-v2v to convert the guest.
# virt-v2v -o rhev -os 10.66.90.115:/vol/v2v_auto/nfs_export -n rhevm virtio-lun
virt-v2v: Guest doesn't define any storage devices

Actual results：
Virt-v2v can not convert guest with virtio lun disk and virtio scsi lun disk,the info shows is not so correct.

Expected results:
virt-v2v can convert guest with virtio lun disk and virtio scsi lun disk.

Additional info:

virt-v2v will not be included in RHEL 7.

virt-v2v will not be included in RHEL 7.