Transition to clustered Data ONTAP by using the 7-Mode Transition Tool

Copy-free transition

Copy-free transition significantly reduces the migration cost by enabling the reuse of 7-Mode disk shelves. The overall duration for performing the transition is faster because no data copy is required.

In copy-free transition, you disconnect all disk shelves from a 7-Mode HA pair and connect them to an HA pair in the target cluster. The metadata of the 7-Mode aggregates and volumes is converted to the clustered Data ONTAP format by the 7-Mode Transition Tool. The time taken for this conversion is not dependent on the size of the aggregates and volumes.

The unit of a copy-free transition is an HA pair. You must move all the disk shelves from the 7-Mode HA pair to the target cluster nodes.

Collecting inventory and running prechecks

You can use the Inventory Collect Tool for collecting 7-Mode inventory. The tool enables you to collect information about 7-Mode systems, hosts, and host applications and to generate an inventory report.

Inventory Collect Tool 2.2 Host and Storage Information Collection Guide

To assess your 7-Mode systems for copy-free transition, you can create a project by adding a 7-Mode HA pair and the target cluster to the 7-Mode Transition Tool and run prechecks. Prechecks verify that the 7- Mode source systems and configurations can be transitioned to the target cluster.

Importing 7-Mode disk shelves

Copy-free transition involves the following tasks:

• Plan your transition to map 7-Mode controllers or vFiler units to target SVMs and design the namespace.
• Run prechecks to verify the compatibility of the 7-Mode systems and target cluster nodes for transition.
• Import 7-Mode disk shelves from a 7-Mode HA pair to an HA pair in a cluster.

  The target HA pair must not be serving any data and must include only the root aggregates. Other nodes in the cluster can be serving data.

• Transition 7-Mode configurations to SVMs.

  Copy-free transition supports the transition of NAS and SAN configurations.

• Roll back storage and configurations to 7-Mode if transition to clustered Data ONTAP fails.

7-Mode Transition Tool 2.2 Copy-Free Transition Guide

Copy-based transition

Copy-based transition enables you to collect inventory and assess 7-Mode controllers, hosts, switches, and applications for transition, and then copy your data and configurations from 7-Mode to clustered Data ONTAP.

Copy-based transition uses SnapMirror technology to copy 7-Mode volumes and configurations from Data ONTAP 7G and 7-Mode to clustered Data ONTAP.

Collecting inventory and assessing for transition

You can perform the following collect and assess tasks by using the 7-Mode Transition Tool:

• Collect inventory information from Data ONTAP systems (7-Mode controllers and nodes in a cluster), hosts, switches, and host applications.
• Assess the features and functionalities of the 7-Mode systems, and identify how these features and functionalities work in the clustered Data ONTAP version selected for transition.

Note: The collect and assess functionality is supported only with copy-based transition in 7-Mode Transition Tool 2.2.

Migrating 7-Mode volumes and configurations

You can perform the following copy-based migration tasks by using the 7-Mode Transition Tool:

• Migrate a group of 7-Mode stand-alone volumes or a group of 7-Mode volumes in volume SnapMirror relationships.
• Run prechecks on volumes included in a transition project to verify their compatibility for transition and view possible corrective actions.
• Apply 7-Mode configurations to clustered Data ONTAP before disconnecting client access, thereby reducing the downtime.

  Copy-based transition supports the transition of NAS and SAN configurations.

7-Mode Transition Tool 2.2 Copy-Based Transition Guide