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    • Why is QoS policy 'None' hidden under 'Custom' during volume provisioning?
      https://kb.netapp.com/on-prem/ontap/DM/System_Manager/SM-KBs/Why_is_QoS_policy_None_hidden_under_Custom_during_volume_provisioning
      Applies to ONTAP System Manager (OSM) Answer Allow QoS default to be 'None' in the dropdown itself, instead of going to 'Custom' and then selecting 'None'. Additional Information Try It In 9.8 > stora...Applies to ONTAP System Manager (OSM) Answer Allow QoS default to be 'None' in the dropdown itself, instead of going to 'Custom' and then selecting 'None'. Additional Information Try It In 9.8 > storage >volume > PERFORMANCE SERVICE LEVEL (PSL) > Value to Custom > Change > Existing > None
    • Workload exceeds the QoS limit on All SAN Array
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Workload_exceeds_the_QoS_limit_on_All_SAN_Array
      Applies to ONTAP 9 All San Array (ASA) Issue Workload exceeds the QoS (Quality of Service) limit on ASA (Asymmetric SAN Array)
    • Operations times out due to AQoS throttling
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Operations_times_out_due_to_AQoS_throttling
      Applies to ONTAP 9 Quality of Service Issue Operations may time out if there is no headroom left after an Adaptive Quality of Service (QoS) expected (minimum) is implemented
    • Quality of Service limit is not enforced
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Quality_of_Service_limit_is_not_enforced
      cluster::> qos statistics workload latency show -volume vol1 -vserver svm1 Workload ID Latency Network Cluster Data Disk QoS Max QoS Min NVRAM Cloud FlexCache SM Sync VA --------------- ------ -------...cluster::> qos statistics workload latency show -volume vol1 -vserver svm1 Workload ID Latency Network Cluster Data Disk QoS Max QoS Min NVRAM Cloud FlexCache SM Sync VA --------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -total- - 48.38ms 3.04ms 48.00us 717.00us 125.00us 17.09ms 0ms 2.00us 0ms 0ms 0ms 0ms vol1 104 464.73ms 19.72ms 0ms 57.00us 14.00us 444.44ms 0ms 1.00us 0ms 0ms 0ms 0ms