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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => kilo-1

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https://bugs.launchpad.net/bugs/1361419

Title:
  Hyper-V driver should provide a more detailed exception in case block
  storage volumes cannot be mounted due to a invalid SAN policy

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  On some editions of Windows Server / Hyper-V server the SAN policy is
  set by default to Online All, bringing online any disk, local or
  shared, attached to the host.

  Since only offline disks can be attached as passthrough disks to a
  Hyper-V VM, this prevents Cinder volumes from being attached to
  instances, resulting in an exception:

  NotFound: Unable to find a mounted disk for target_iqn:
  iqn.2010-10.org.openstack:volume-d8904a90-d189-4fc8-a7b4-4fcdc7309166

  Since this can be an issue not easy to troubleshoot without knowing
  the specific context, it'd be useful to include a reference to the SAN
  policy in the exception message.

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