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[Adam Gandelman <1329764@xxxxxxxxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1329764

Title:
  Hyper-V volume attach issue: wrong SCSI slot is selected

Status in OpenStack Compute (Nova):
  Fix Released
Status in OpenStack Compute (nova) icehouse series:
  Fix Released

Bug description:
  When attaching volumes, the Hyper-V driver selects the slot on the
  SCSI controller by using the number of drives attached to that
  controller.

  This leads to exceptions when detaching volumes having lower numbered
  slots and then attaching a new volume.

  Take for example 2 volumes attached which will have 0 and 1 as
  controller addresses. If the first one gets detached, the next time
  we'll try to attach a volume the controller address 1 will be used (as
  it's the number of drives attached to the controller at that time) but
  that slot is actually uesd, so it will raise an exception.

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