Users Guide

4. Cutover import – Cutover can be performed only when the import processing state is Ready For Cutover. In other
words, cutover is a final confirmation. You can select to cut over automatically without user intervention. After the cutover
step, I/O cannot go back to the source system volume.
In addition, the following processes are available during the import procedure:
● Pause import – Pause can be performed when the import processing state is Copy In Progress. When an import session
is paused, only the background copy is stopped. The forwarding of host I/O to the source system continues to be active.
NOTE: The Pause import action on a CG only pauses the member volumes that are in the Copy In Progress
state. The CG remains in the In Progress state. Other member volumes that are in other states, such as Queued
or In Progress, are not paused and may proceed to the Ready For Cutover state. The other member volumes
can be paused when they reach the Copy In Progress state by using the Pause import action again on the CG. If
any of the member volumes are in the Paused state but the overall status of the CG is In Progress, both the Pause
and Resume import action options are available for the CG.
● Resume import – Resume can be performed when the import processing state is Paused.
● Cancel import – Cancel can be performed only when the import processing state is Copy In Progress (for volume), In
Progress (for consistency group), Ready For Cutover, Queued, Paused (for volume), or Scheduled, or Cancel
Failed (for consistency group). Cancel allows you to cancel the import process with the click of a button and change the
active path back to the source.
For the Dell EqualLogic PS Series only – The source volume is taken offline after a successful cutover operation.
For the Dell Compellent SC Series, Dell EMC Unity Series, and Dell EMC VNX2 Series – Host access to the source volume is
removed after a successful cutover operation.
Agentless import of external storage to PowerStore overview
Unlike non-disruptive import, agentless import of external storage to a PowerStore cluster is independent of the operating
system and the multipathing solution on the host, and the front end connectivity between the host and the source system.
Agentless import does not require the installation of host plugin software on the host, however, you do need to reconfigure the
host application to work with the new PowerStore volumes. Only a one time host application downtime is required prior to the
migration. The downtime only includes renaming or reconfiguring the host application, file systems, and datastores to the new
PowerStore volumes.
Use the agentless import option to migrate the external storage to a PowerStore cluster when the operating environment
running on the source system does not match the respective one listed in Supported combinations of host OS, host multipath
software, host protocol, and source system for non-disruptive import on page 8.
NOTE:
When the operating environment running on your source system matches the respective one listed in Supported
combinations of host OS, host multipath software, host protocol, and source system for non-disruptive import on page 8,
you can choose to use the agentless import option instead of the non-disruptive option. However, the host plugin software
must not be installed on the associated host or hosts.
The following table lists the supported types of source systems and operating environment required for an agentless import.
Table 2. Supported source systems and operating environment required for agentless import
Source system Operating environment
Dell EqualLogic PS 10.0.x or later
Dell Compellent SC 7.3 or later
Dell EMC Unity 4.4 or later
Dell EMC VNX2 5.33.008.5.x or later
Dell EMC XtremIO X1 4.0.25 or later
Dell EMC XtremIO X2 6.2 or later
10 Introduction