topic Re: NetApp CIFS File Share slow preference in ONTAP Discussions

NetApp CIFS File Share slow preference

Terry_Lui — Wed, 04 Jun 2025 10:10:33 GMT

After 1.5MB copied to CIFS File Share, it took another 30 seconds to access properties page of file / opening file.
We repeat action 1 - 2 with another 70MB file. It took 60 seconds to complete copy and another 180 seconds to access properties page of file / opening file. (Note: File explorer was "not responding" when accessing properties page)
It took 60 seconds to copy 70MB file from CIFS File Share from NetApp FAS 2720 NAS to Windows 10 workstation.
After 70MB file copied to CIFS File Share, it took 5 seconds to access properties page of file / opening file.

Re: NetApp CIFS File Share slow preference

Terry_Lui — Sat, 23 Oct 2021 17:55:30 GMT

But we checked on EMS log, there were some info message " wafl.scan.ownblocks.done:debug]: Completed block ownership calculation on volume ixxxxxh_mxxxxxxxr_clone_23102021_124103_dr @vserver:xxxxxxxxxxxxxxxxxxxxx1. The scanner took 80 ms."

" wafl.vol.snap_create.done:debug]: params: {'type': 'Volume', 'owner': '', 'vol': 'ixxxxxxxxxxxxne_23102021_124103_dr', 'app': '', 'volident': '@vserver:bxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx1', 'run_time': '23964'}"

Is that the issue effect the CIFS preference?

Re: NetApp CIFS File Share slow preference

Ontapforrum — Sat, 23 Oct 2021 17:31:05 GMT

Is there Crowdstrike client version 6.24.x ?
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/Slow_PDF%2C_Excel%2C_Word%2C_Powerpoint%2C_or_other_file_types_opening_on_CIFS_share_due_to_Crowdstrike

Usually with CIFS, slowness is either at the Network layer or at the Volume (disk level), in general I suggest gathering some information around it's historical performance so that you could take the right path in identifying the cause.

Kb Pointer to help troubleshoot:
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_troubleshoot_slow_access_to_files_via_CIFS%2F%2FSMB_protocol

Re: NetApp CIFS File Share slow preference

Terry_Lui — Sat, 23 Oct 2021 17:56:15 GMT

Thanks for your reply, but we tried to upload a 200MB file to share folder, the preference is accepted. Just few sec can be uploaded to share folder. But after uploaded, we wanna open or modify the file in the share folder, the windows file explorer will be idle for a mins. sometime file explorer will no response. when we try to copy the files from share folder to local disk, it will idle for calculate the copy file time for around a mins than coping files just spend few sce to copy. I think network should be no problem. Any recommandation about this issue? Many Thanks...

Re: NetApp CIFS File Share slow preference

Ontapforrum — Sat, 23 Oct 2021 19:04:22 GMT

I am assuming this is ruled out (Crowdstrike) ?

Is this same from multiple workstations ?

Is the CIFS share via IP or FQDN, security style of the volume and could you share the 'secd' logs from the controller ? Might be worth doing pktt trace just to rule out any issues from storage side.

Have a look at this kB.
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_troubleshoot_slow_browsing_on_CIFS_Shares

Re: NetApp CIFS File Share slow preference

paul_stejskal — Mon, 25 Oct 2021 14:51:44 GMT

Those are debug messages and can be ignored.

Re: NetApp CIFS File Share slow preference

paul_stejskal — Mon, 25 Oct 2021 14:52:20 GMT

Hi please start here: https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_troubleshoot_performance_issues_in_ONTAP_9

Let me know if you run into any issues or have any questions/feedback.