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---
features:
  - |
    Hitachi driver:  Support Global-Active Device (GAD) volume.
    GAD is a one of Hitachi storage fucntion uses volume replication
    to provide a high-availability environment for hosts across storage
    systems and sites. New properties will be added in configuration.
    ``hbsd:topology`` sets to ``active_active_mirror_volumex`` would
    specify a GAD volume. ``hitachi_mirror_xxx`` parameters would
    specify a secondary storage for GAD volume.