Chapter 9. Storage migration 387
9.1.1  Interoperability and compatibility
Interoperability is an important consideration when a new storage system is set up in an 
environment that contains storage infrastructure. Before attaching any external storage 
systems to the Storwize V7000, see the IBM System Storage Interoperation Center (SSIC).
At the SSIC site, select IBM System Storage Midrange Disk as the Storage Family, then 
Storwize V7000 Storage Controller Support as the Storage Model. You can then refine 
your search by selecting the external storage controller that you want to use in the Storage 
Controller menu.
The matrix results indicate the external storage that you want to attach to the Storwize V7000, 
such as minimum firmware level or support for disks greater than 2 TB.
9.1.2  Prerequisites
Before the storage migration wizard can be started, the external storage system must be 
visible to the Storwize V7000. You also need to confirm that the restrictions and prerequisites 
are met.
Administrators can migrate data from the external storage system to the system that uses 
iSCSI connections and Fibre Channel or Fibre Channel over Ethernet connections. 
Prerequisites for Fibre Channel connections
The following prerequisites for Fibre Channel connections must be met:
/SM590000Cable this system into the SAN of the external storage that you want to migrate. Ensure 
that your system is cabled into the same storage area network (SAN) as the external 
storage system that you are migrating. 
If you are using Fibre Channel, connect the Fibre Channel cables to the Fibre Channel 
ports in both canisters of your system, and then to the Fibre Channel network. If you are 
using Fibre Channel over Ethernet, connect Ethernet cables to the 10 Gbps Ethernet 
ports.
/SM590000Change VMware ESX host settings, or do not run VMware ESX. If you have VMware ESX 
server hosts, you must change settings on the VMware host so copies of the volumes can 
be recognized by the system after the migration is completed. To enable volume copies to 
be recognized by the system for VMware ESX hosts, you must complete one of the 
following actions:
– Enable the EnableResignature setting.
– Disable the DisallowSnapshotLUN setting.
To learn more about these settings, see the documentation for the VMware ESX host.
Prerequisites for iSCSI connections
The following prerequisites for iSCSI connections must be met:
/SM590000Cable this system to the external storage system with a redundant switched fabric. 
Migrating iSCSI external storage requires that the system and the storage system are 
connected through an Ethernet switch. Symmetric ports on all nodes of the system must 
be connected to the same switch and must be configured on the same subnet. 
Note: Test the setting changes on a non-production server. The LUN has a different unique 
identifier after it is imported. It resembles a mirrored volume to the VMware server.