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[YaoZheng_ZTE <zheng.yao1@xxxxxxxxxx>]

Public bug reported:

Reproducing method as following:
1、nova.conf  configure iscsi_used_multipath_tool=multipath， restart nova-compute service
2、launch instance vm1 boot from volume(used HpSan),then attach volume1 for this vm1
3、launch instance vm2 boot from volume(used HpSan),then attach  volume2 for this vm2 at the same host
4、terminate vm2 
5、vm2 has been destoryed , but  /dev/disk/by-path/  device can not be completely removed

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1402535

Title:
  terminate instances boot from volume used multipath  have  esidual
  device

Status in OpenStack Compute (Nova):
  New

Bug description:
  Reproducing method as following:
  1、nova.conf  configure iscsi_used_multipath_tool=multipath， restart nova-compute service
  2、launch instance vm1 boot from volume(used HpSan),then attach volume1 for this vm1
  3、launch instance vm2 boot from volume(used HpSan),then attach  volume2 for this vm2 at the same host
  4、terminate vm2 
  5、vm2 has been destoryed , but  /dev/disk/by-path/  device can not be completely removed

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