Description of problem:

I'm trying to create a guest with 500 disks for testing, writing
the XML by hand.

I got to:

    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/home/rjones/disk1.img'/>
      <target bus='scsi'/>
      <address type='drive' controller='0' bus='0' target='0' unit='1'/>
    </disk>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/home/rjones/disk2.img'/>
      <target bus='scsi'/>
      <address type='drive' controller='0' bus='0' target='0' unit='2'/>
    </disk>
(etc)

but then libvirt complains:

error: missing target information for device /home/rjones/disk1.img

which is technically true, but honestly couldn't libvirt just
generate those target device names?  Writing 500 of them by
hand is impossible.

Version-Release number of selected component (if applicable):

libvirt-3.2.0-3.el7.x86_64

Steps to Reproduce:
1. See above.