Dell EMC Unity™ Family Third-Party System Migration using SAN Copy Pull User Guide

About third-party system migration

The third-party system migration feature uses SAN Copy Pull to migrate block resources (such as LUNs, volumes, and virtual disks), including configuration data, from a source third-party block storage system to standalone LUNs or VMFS Datastores on a destination Dell EMC Unity storage system that is running software version 4.4 or later. Data is copied on a block-by-block basis.

Create the destination LUN slightly larger (such as 1 GB larger) than the source LUN. Do not use an existing LUN on the destination system because the migrated data will overwrite the data on the existing LUN.

The migration is a cold data operation. The I/O on the source third-party block storage system must be stopped. No changes can be applied to the source while the migration is in process. It is recommended that you plan a downtime for the source third-party block storage system to perform the migration operation.

The third-party block storage system must support either the Fibre Channel (FC) or iSCSI protocol.

The migration is always conducted from the Dell EMC Unity storage system. The destination system makes a remote call to the third-party block storage system and initiates a pull of the source storage resources to the destination system.

After the migration operation is completed, you need to configure host I/O operations on the destination system.

All managing and monitoring of the sessions will be done through the CLI. The migration commands are described in the "Configure migration using the CLI" chapter.