Since the Nova log shows an error from cinderclient:
2014-03-12 18:03:39.790 9573 TRACE nova.compute.manager [instance: 9f1a00b6-4b88-431e-a163-feaf06e0bfe3] ClientException: The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-e990ac94-97d9-41f3-b1e1-ca63e7d1d2bc)
What do the Cinder server logs say for this request?
Since the Nova log shows an error from cinderclient:
2014-03-12 18:03:39.790 9573 TRACE nova.compute. manager [instance: 9f1a00b6- 4b88-431e- a163-feaf06e0bf e3] ClientException: The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-e990ac94- 97d9-41f3- b1e1-ca63e7d1d2 bc)
What do the Cinder server logs say for this request?