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    • File reappears after deleting it in Windows Explorer because file is open in a CIFS session
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/File_reappears_after_deleting_it_in_Windows_Explorer_because_file_is_open_in_a_CIFS_session
      Applies to ONTAP 9 CIFS/SMB Issue Windows File Explorer deletes file; however, after refreshing File Explorer, the file reappears Any further operation (like accessing, checking ACLs) on the file is n...Applies to ONTAP 9 CIFS/SMB Issue Windows File Explorer deletes file; however, after refreshing File Explorer, the file reappears Any further operation (like accessing, checking ACLs) on the file is not possible anymore
    • How to troubleshoot basic lock issues with NAS protocols
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/How_to_troubleshoot_basic_lock_issues_with_NAS_protocols
      Applies to ONTAP 9 Description The below process describes what data to collect and review to determine proper steps in troubleshooting lock related issues for NAS protocols.
    • NFS (Linux) client reports no file locks information on NFS share
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/NFS_Linux_client_reports_no_file_locks_information_on_NFS_share
      Applies to ONTAP 9 NFS Version 3 Linux Issue NFS (Linux) client reports no file locks information on NFS share # flock -e -w 3 /<nfs-share>/lockfile sleep 5 flock: /<nfs-share>/lockfile: No locks avai...Applies to ONTAP 9 NFS Version 3 Linux Issue NFS (Linux) client reports no file locks information on NFS share # flock -e -w 3 /<nfs-share>/lockfile sleep 5 flock: /<nfs-share>/lockfile: No locks available
    • How does file locking work between NFS and SMB protocols?
      https://kb.netapp.com/on-prem/ontap/da/NAS/NAS-KBs/How_does_file_locking_work_between_NFS_and_SMB_protocols
      Advisory locking is when the operating system keeps track of which files have been locked by which process, but does not prevent a process from writing to a file that is locked by another process. Bec...Advisory locking is when the operating system keeps track of which files have been locked by which process, but does not prevent a process from writing to a file that is locked by another process. Because of differences between the NFS and SMB file locks, an NFS client might fail to access a file previously opened by an SMB application. For more instances of what happens when an NFS client attempts to access a file locked by an SMB application, please see About file locking between protocols.
    • High CREATE or OPEN latency when many clients attempt to access the same file
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/High_CREATE_or_OPEN_latency_when_many_clients_attempt_to_access_the_same_file
      The latency will be seen in qos statistics volume latency show in the Data column Nblade.delayedOplockBreakAck: SMB Clients are showing delays in responding to oplock recalls, potentially due to netwo...The latency will be seen in qos statistics volume latency show in the Data column Nblade.delayedOplockBreakAck: SMB Clients are showing delays in responding to oplock recalls, potentially due to network latency, heavy processing load, or other factors impacting responsiveness. ONTAP will suspend when locks are assigned to the same file from different clients, which may result in high wait time for CREATE/OPEN calls.