Comment # 9 on bug 1070478 from Walddys Emmanuel Dorrejo C�spedes

(In reply to James Fehlig from comment #4)
> (In reply to Walddys Emmanuel Dorrejo C�spedes from comment #2)
> > <disk type='file' device='disk'>
> >   <driver name='qemu' type='raw'/>
> >   <source file='/home/wedc/VMs/crs.img'/>
> >   <target dev='vdb' bus='virtio'/>
> >   <shareable/>
> >   <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
> > </disk>
> 
> This XML snippet of your disk device is correct. The <shareable> element
> should allow the disk to be shared. But as Fei noted, your libvirt is not
> passing 'share-rw=on' when invoking qemu. There is an upstream patch to fix
> it, which will be included in the upcoming libvirt 3.10.0 release.

where i put this code

"-device virtio-blk-pci,drive=vda,share-rw=on
# share-rw=on"

on the xml file.