While deploying HE on NFSv3 from cdrom, host on rhel 7.1.z vm on rhel 6.7, the --deploy command fails on the last steps with this output:

[ INFO  ] Enabling and starting HA services
[ INFO  ] Saving hosted-engine configuration on the shared storage domain
[ ERROR ] Failed to execute stage 'Closing up': Unable to write HEConfImage
[ INFO  ] Stage: Clean up
[ INFO  ] Generating answer file '/var/lib/ovirt-hosted-engine-setup/answers/answers-20150701164916.conf'
[ INFO  ] Stage: Pre-termination
[ INFO  ] Stage: Termination

2015-07-01 16:49:16 INFO otopi.plugins.ovirt_hosted_engine_setup.storage.heconf heconf._closeup_create_tar:123 Saving hosted-engine configuration on the shared storage domain
2015-07-01 16:49:16 DEBUG otopi.plugins.ovirt_hosted_engine_setup.storage.heconf heconflib.create_heconfimage:180 temp tar file: /tmp/tmpLpa_uf.tar
2015-07-01 16:49:16 DEBUG otopi.plugins.ovirt_hosted_engine_setup.storage.heconf heconflib.create_heconfimage:210 saving on: /rhev/data-center/mnt/192.168.1.107:_home_storage/1c373492-4b7c-413d-a919-a7eebaaac70f
/images/43528118-e154-4e53-8015-21a77495f9a0/6c190cdd-d20c-4981-a64f-ca19042377a5
2015-07-01 16:49:16 DEBUG otopi.plugins.ovirt_hosted_engine_setup.storage.heconf heconflib.create_heconfimage:219 executing: 'dd if=/tmp/tmpLpa_uf.tar of=/rhev/data-center/mnt/192.168.1.107:_home_storage/1c37349
2-4b7c-413d-a919-a7eebaaac70f/images/43528118-e154-4e53-8015-21a77495f9a0/6c190cdd-d20c-4981-a64f-ca19042377a5 bs=4k'
2015-07-01 16:49:16 DEBUG otopi.plugins.ovirt_hosted_engine_setup.storage.heconf heconflib.create_heconfimage:229 stdout: 
2015-07-01 16:49:16 DEBUG otopi.plugins.ovirt_hosted_engine_setup.storage.heconf heconflib.create_heconfimage:230 stderr: dd: apertura di "/rhev/data-center/mnt/192.168.1.107:_home_storage/1c373492-4b7c-413d-a91
9-a7eebaaac70f/images/43528118-e154-4e53-8015-21a77495f9a0/6c190cdd-d20c-4981-a64f-ca19042377a5" non riuscita: Permesso negato

2015-07-01 16:49:16 DEBUG otopi.context context._executeMethod:155 method exception
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/otopi/context.py", line 145, in _executeMethod
    method['method']()
  File "/usr/share/ovirt-hosted-engine-setup/scripts/../plugins/ovirt-hosted-engine-setup/storage/heconf.py", line 150, in _closeup_create_tar
    dest
  File "/usr/lib/python2.7/site-packages/ovirt_hosted_engine_setup/heconflib.py", line 233, in create_heconfimage
    raise RuntimeError('Unable to write HEConfImage')
RuntimeError: Unable to write HEConfImage
2015-07-01 16:49:16 ERROR otopi.context context._executeMethod:164 Failed to execute stage 'Closing up': Unable to write HEConfImage


there is a permission denied issue on 
'dd if=/tmp/tmpLpa_uf.tar of=/rhev/data-center/mnt/192.168.1.107:_home_storage/1c37349
2-4b7c-413d-a919-a7eebaaac70f/images/43528118-e154-4e53-8015-21a77495f9a0/6c190cdd-d20c-4981-a64f-ca19042377a5 bs=4k'

selinux is in permissive mode. ls -l shows:

-rw-rw----. 1 vdsm kvm 1073741824 Jul  1 14:14 /rhev/data-center/mnt/192.168.1.107:_home_storage/1c373492-4b7c-413d-a919-a7eebaaac70f/images/43528118-e154-4e53-8015-21a77495f9a0/6c190cdd-d20c-4981-a64f-ca19042377a5

drwxr-xr-x. 2 vdsm kvm 4096 Jul  1 14:14 /rhev/data-center/mnt/192.168.1.107:_home_storage/1c373492-4b7c-413d-a919-a7eebaaac70f/images/43528118-e154-4e53-8015-21a77495f9a0

drwxr-xr-x. 6 vdsm kvm 4096 Jul  1 14:14 /rhev/data-center/mnt/192.168.1.107:_home_storage/1c373492-4b7c-413d-a919-a7eebaaac70f/images