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ONTAP 7-Mode Transition

Prerequisites for transitioning CIFS configurations

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CIFS configurations are transitioned by the 7-Mode Transition Tool only when certain prerequisites are met on the 7-Mode system and cluster. If any of the conditions are not met, the tool does not transition the configuration.

7-Mode prerequisites

  • The CIFS license must be added.

  • If the MultiStore license is enabled, CIFS must be added to the list of allowed protocols for the vFiler unit that owns the transitioning volumes.

  • CIFS must be set up and running during transition.

    Even after client access is disconnected and you prepare to start the export phase, the CIFS service must be running on the 7-Mode systems.

  • The authentication type for CIFS must be Active Directory (AD) or Workgroup.

Cluster prerequisites

  • The CIFS license must be added.

  • The following CIFS authentication methods are supported in different ONTAP versions:

    • Clustered Data ONTAP 8.2.x and 8.3.x support AD authentication.

    • ONTAP 9.0 or later supports AD authentication and Workgroup authentication.

  • The following table identifies which authentication method must be used on the target SVM:

    7-Mode authentication method Clustered Data ONTAP 8.2.x and 8.3.x authentication method ONTAP 9.5 or earlier authentication method

    AD

    AD

    AD

    Workgroup

    AD

    Workgroup or AD

  • You can transition the CIFS configuration from 7-Mode to ONTAP if the AD domains do not match between the 7-Mode CIFS server and the target SVM CIFS server.

    The tool triggers an ignorable blocking error when an AD domain name mismatch is detected. To proceed with the transition, you can acknowledge the blocking error.

  • The CIFS server must be manually configured before the apply configuration (precutover) phase.

    You can create the CIFS server on the SVM in the following two ways:

    If you want to…​ Do the following…​

    Transfer or preserve the CIFS server identity to the target SVM

    		 
    You have the following two options to create the CIFS server:

    1. Applicable for all versions of ONTAP:

      • Before the SVM provision phase, you must reconfigure the CIFS server on the 7-Mode system system by using a temporary CIFS identity.

        This reconfiguration allows the original CIFS server identity to be configured on the SVM. You must verify that the CIFS server is running on the 7-Mode system during the “SVM Provision” and “Export & Halt” phases with the new temporary identity. This action is required to read CIFS configurations from 7-Mode during the SVM Provision and “Export & Halt” phases.

      • You must configure the CIFS server on the target SVM with the original 7-Mode CIFS identity.

      • After these conditions are met, you can perform the “SVM Provision” operation, and then perform the “Export & Halt” operation to enable client access to ONTAP volumes.

    2. Applicable for ONTAP releases 9.0 through 9.5:

      • Use the vserver cifs modify command to change the CIFS server name (CIFS Server NetBIOS Name).

        Using this feature, you should create a CIFS server on the target SVM with a temporary identity, and then perform the “SVM Provision” operation.

      • After the “import”' phase, you can run the vserver cifs modify command on the target cluster to replace the target SVM CIFS identity with the 7-Mode CIFS identity.

    Use a new identity

    • Before the “SVM Provision” phase, you must configure the CIFS server on the target SVM with a new CIFS identity.

    • You must verify that the CIFS server is up and running on the 7-Mode system during the “SVM Provision” and “Export & Halt” phases.

      This action is required to read CIFS configurations from 7-Mode during the “SVM Provision`"and "`Export & Halt”.

    • After verifying these conditions, you can perform the “SVM Provision” operation.

      You can then test the SVM configurations, and then plan to perform the storage cutover.