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ONTAP SAN Veeam backup LUN volume full unable to reclaim space

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Applies to

  • ONTAP
  • Veeam Backup & Replication
  • Microsoft Windows Server 2019 and 2016
  • Resilient File System (ReFS)

Issue

  • Veeam backup repository LUN full and underlying volume is consuming much more space than expected and keeps growing
  • Not possible to reclaim space through SCSI UNMAP/TRIM
  • SCSI UNMAP is not functioning correctly with space allocation enabled

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