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    • SCMM 2019 Hyper-V 2016 no ODX is used when deploying VMs from the VMM, only BITS
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/SCMM_2019_Hyper_V_2016_no_ODX_is_used_when_deploying_VMs_from_the_VMM_only_BITS
      Applies to ONTAP 9.0 Microsoft Hyper-V Microsoft SCMM / VMM Issue Extremely slow when deploying virtual machine using Microsoft System Center Configuration Manager (SCMM) from virtual machine manager ...Applies to ONTAP 9.0 Microsoft Hyper-V Microsoft SCMM / VMM Issue Extremely slow when deploying virtual machine using Microsoft System Center Configuration Manager (SCMM) from virtual machine manager (VMM) The copy jobs from the SCVMM libraries are done using Background Intelligent Transfer Service ( BITS )
    • Slowness on FC LUNs on new ONTAP Cluster
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Slowness_on_FC_LUNs_on_new_ONTAP_Cluster
      Applies to ONTAP 9 Upgrade to new AFF Cluster FC LUNs Issue Migration from an old AFF to new AFF, such as an AFF-8080 to AFF-A400 seems to show worse performance 1 GB/s is expected such as on AFF-8080...Applies to ONTAP 9 Upgrade to new AFF Cluster FC LUNs Issue Migration from an old AFF to new AFF, such as an AFF-8080 to AFF-A400 seems to show worse performance 1 GB/s is expected such as on AFF-8080, but performance may only be 300-700 MB/s High latency is seen if using indirect i/o (using a LIF on node 1, but the volume resides on node 2's disks) SnapMirror testing (used as a baseline) of performance between one node and another only does 300 MB/s of throughput
    • ODX (Offloaded Data Transfer) nonfunctional though requirements met
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/ODX_Offloaded_Data_Transfer_nonfunctional_though_requirements_met
      Applies to ONTAP 9 SMB3 ODX (Offload Data Transfer) Issue ODX (Offload Data Transfer) not functioning though all requirements appear to be met Possible error: Windows cannot access \azgmain\data error...Applies to ONTAP 9 SMB3 ODX (Offload Data Transfer) Issue ODX (Offload Data Transfer) not functioning though all requirements appear to be met Possible error: Windows cannot access \azgmain\data error code: 0x80070035
    • Offloaded Data Transfer (ODX) not working as expected
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/Offloaded_Data_Transfer_ODX_not_working_as_expected
      Offloaded Data Transfer (ODX) Offloaded Data Transfer (ODX) is not working even though it has been configured correctly A packet trace reveals the client attempting offloading, but using the offloadin...Offloaded Data Transfer (ODX) Offloaded Data Transfer (ODX) is not working even though it has been configured correctly A packet trace reveals the client attempting offloading, but using the offloading method “copychunk” which ONTAP does not support 408 2021-05-20 12:33:28.188562 10.10.15.25 10.10.10.15 SMB2 Ioctl Response, Error: STATUS_NOT_SUPPORTED <<<< ONTAP responds
    • volume efficiency undo command does not clear deduplicated blocks
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/volume_efficiency_undo_command_does_not_clear_deduplicated_blocks
      Applies to ONTAP 9 Storage Efficiency Issue volume efficiency undo command does not clear deduplicated blocks
    • token.vol.is.compressed EMS event during copy offload attempt in ONTAP
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/token.vol.is.compressed_EMS_event_during_copy_offload_attempt_in_ONTAP
      Applies to ONTAP 9 Issue The following notice appears in the EMS event log: [cluster1: token_mgr_admin: token.vol.is.compressed:notice]: A 'token create' request in volume vol1 failed because the volu...Applies to ONTAP 9 Issue The following notice appears in the EMS event log: [cluster1: token_mgr_admin: token.vol.is.compressed:notice]: A 'token create' request in volume vol1 failed because the volume is compressed.
    • What is a PIT file in Data ONTAP?
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/What_is_a_PIT_file_in_Data_ONTAP
      A Point-In-Time (PIT) file is a special file used for ODX or Copy Offload procedures. Copy Offload is the process of sending only control data from the client to ONTAP while copying from one folder to...A Point-In-Time (PIT) file is a special file used for ODX or Copy Offload procedures. Copy Offload is the process of sending only control data from the client to ONTAP while copying from one folder to another on the same storage node. The contents of the file are transferred internally in ONTAP and the client requests the blocks to be transferred. The PIT file is the container which ONTAP uses to copy the blocks internally from one folder to another
    • iOS Files app does not list content of CIFS shares
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/iOS_Files_app_does_not_list_content_of_CIFS_shares
      Applies to ONTAP 9.8 and later CIFS/SMB Apple iOS 15 native files app Issue iOS Files app does not list content of CIFS shares: The initial connection is using the Apple iOS "Files" app is successful....Applies to ONTAP 9.8 and later CIFS/SMB Apple iOS 15 native files app Issue iOS Files app does not list content of CIFS shares: The initial connection is using the Apple iOS "Files" app is successful. When connecting to the root "/" of the storage system, e.g. "cifs://storage.domain.com/" all available volumes are listed. When selecting a CIFS share/volume no files or folders are shown.
    • What is the impact of disabling or enabling Microsoft ODX "Copy offload"?
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/What_is_the_impact_of_disabling_or_enabling_Microsoft_ODX_Copy_offload
      Once ODX is disabled, the impact is that ODX is disabled for all future sessions. Like other CIFS options, the ODX portion is negotiated in tree connect & it remains with the session until it disconne...Once ODX is disabled, the impact is that ODX is disabled for all future sessions. Like other CIFS options, the ODX portion is negotiated in tree connect & it remains with the session until it disconnects Hence, disabling ODX does not impact existing sessions, but new sessions will not see the option to do it & will no longer use ODX If ODX is already disabled, enabling ODX is also non-impactful. This is how it is tested: Started a copy using ODX It is verified the copy is still using ODX.
    • Copy of data from one volume to another is slower compared to the ODX enabled SVM
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Copy_of_data_from_one_volume_to_another_is_slower_compared_to_the_ODX_enabled_SVM
      Applies to ONTAP 9 Offloaded Data Transfer (ODX) SMB3 Windows client Issue Facing slowness while copying the data from one volume to another via Windows client machine. The comparison is made against ...Applies to ONTAP 9 Offloaded Data Transfer (ODX) SMB3 Windows client Issue Facing slowness while copying the data from one volume to another via Windows client machine. The comparison is made against another cluster where throughput is better. SMB3 is enabled for the cluster showing better throughput: ::> vserver cifs options show
    • High build time process latency on the teamcity build agent
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/High_build_time_process_latency_on_the_teamcity_build_agent
      Applies to ONTAP 9 CIFS/SMB Hyper-V TeamCity build agent Issue Build time increased twice in TeamCity build environment High volume Other latency when the Hyper-V virtual machine use SMB