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    • Prefail disk causing Huge Performance issues
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Prefail_disk_causing_Huge_Performance_issues
      Applies to ONTAP 9 Issue High FlexVol latency observed Running qos statistics volume latency show command shows primary delay under disk column
    • Very poor performance during backup to LTO8 tape
      https://kb.netapp.com/on-prem/ontap/DP/NDMP/NDMP-KBs/Very_poor_performance_during_backup_to_LTO8_tape
      Applies to ONTAP 9 NDMP Disk performance issue Tape backup Issue NDMP backups to LTO8 tape are not running at the expected speed Expected ~3TB/h, seeing ~800GB/h