My storage supports Thin Provisioning. How can I zero unused space within an volume group to allow it to be reclaimed by my storage?

Solution Unverified - Updated -

Issue

  • How can I zero unused space within an Volume Group, to allow this space to be reclaimed by storage technologies like  EMC²'s "space page reclaim" or Hitachi HDS's "zero page reclaim"?

Environment

  • Red Hat Enterprise Linux 6 (RHEL6)
  • Enterprise storage supporting Thin Provisioning like EMC²'s "space page reclaim" or Hitachi HDS's "zero page reclaim"

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