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The bug can also be reproduced on rhel6,version:
virt-v2v-0.9.1-1.el6_5.x86_64
libguestfs-1.20.8-5.el6.x86_64
libvirt-0.10.2-19.el6.x86_64

+++ This bug was initially created as a clone of Bug #987282 +++

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:

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

Virt-v2v needs to run on the latest Red Hat Enterprise Linux release
to ensure it can correctly read and modify new guest filesystem
features.  A new version of virt-v2v is now available for RHEL 7.1.

Before RHEL 7.1 is released, follow the instructions here to
install unsupported preview packages on top of RHEL 7.0:
https://www.redhat.com/archives/libguestfs/2014-May/msg00090.html

After RHEL 7.1 is released, virt-v2v will be available in
Technical Preview.

You can run virt-v2v in a single virtual machine.  Other
requirements are covered here:
http://libguestfs.org/virt-v2v.1.html#resource-requirements

If you find a missing feature or bug in the new version of virt-v2v
please file a bug using the following link:
https://bugzilla.redhat.com/enter_bug.cgi?product=Red%20Hat%20Enterprise%20Linux%207&component=libguestfs