ONTAP Discussions

NetApp storage and Active Directory Time Issues

Harvey_Mulenga
3,681 Views
 
1 ACCEPTED SOLUTION

Ontapforrum
3,637 Views

Ideally, if the time difference between the storage system and the DC is greater than 5 minutes, only then a CIFS authentication failure will occur.

 

I would suggest, instead of using 'DC' as time-server, use external NTP server. External NTP server enables the storage array to automatically synchronize the controller's clocks with an external host . The controller periodically queries the configured NTP server, and then uses the results to update its internal time-of-day clock.

 

Following is a very detailed KB on this topic for troubleshooting purpose:
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_configure_and_troubleshoot_NTP_on_clustered_Data_ONTAP_8.2_and_...

 

https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_determine_if_a_Windows_Domain_Controller_is_a_suitable_NTP_serv...

 

ONTAP9:
https://docs.netapp.com/ontap-9/index.jsp?topic=%2Fcom.netapp.doc.dot-cm-sag%2FGUID-644CED2B-ABC9-4FC5-BEB2-1BE6A867919E.html

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4 REPLIES 4

Harvey_Mulenga
3,680 Views

Why do we have to keep adjusting time on Storage to Sync it to AD? This is happening on daily basis. The environment has two NTP set. A time skew of just two minutes makes our shares inaccessible!

Harvey_Mulenga
3,659 Views

I must mention that we have two ADs which we use as NTP Servers. Strangely, we keep adjusting time on our storage every other day! What could be the problem?

Ontapforrum
3,638 Views

Ideally, if the time difference between the storage system and the DC is greater than 5 minutes, only then a CIFS authentication failure will occur.

 

I would suggest, instead of using 'DC' as time-server, use external NTP server. External NTP server enables the storage array to automatically synchronize the controller's clocks with an external host . The controller periodically queries the configured NTP server, and then uses the results to update its internal time-of-day clock.

 

Following is a very detailed KB on this topic for troubleshooting purpose:
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_configure_and_troubleshoot_NTP_on_clustered_Data_ONTAP_8.2_and_...

 

https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/How_to_determine_if_a_Windows_Domain_Controller_is_a_suitable_NTP_serv...

 

ONTAP9:
https://docs.netapp.com/ontap-9/index.jsp?topic=%2Fcom.netapp.doc.dot-cm-sag%2FGUID-644CED2B-ABC9-4FC5-BEB2-1BE6A867919E.html

Harvey_Mulenga
3,453 Views

Hi All,

 

Thank you very much for the support. I will go through all the posts and get back to you at some point.

Best Regards

Harvey

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