388 Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1
In addition, modify the Ethernet port attributes to enable the external storage on the 
Ethernet port to enable external storage connectivity. To modify the Ethernet port for 
external storage, click Network → Ethernet Ports and right-click a configured port. Select 
Modify Storage Ports to enable the port for external storage connections. 
Cable the Ethernet ports on the storage system to fabric in the same way as the system 
and ensure that they are configured in the same subnet. Optionally, you can use a virtual 
local area network (VLAN) to define network traffic for the system ports. 
For full redundancy, configure two Ethernet fabrics with separate Ethernet switches. If the 
source system nodes and the external storage system both have more than two Ethernet 
ports, extra redundant iSCSI connection can be established for increased throughput.
/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, 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.
If the external storage system is not detected, the warning message that is shown in 
Figure 9-1 is displayed when you attempt to start the migration wizard. Click Close and 
correct the problem before you try to start the migration wizard again. 
Figure 9-1   Error message if no external storage is detected
9.2  Storage migration wizard
The storage migration wizard simplifies the migration task. The wizard features easy-to-follow 
windows that guide users through the entire process. The wizard shows you which 
commands are being run so that you can see exactly what is being performed throughout the 
process.
Note: Test the setting changes on a non-production server. The LUN has a different unique 
identifier after it is imported. It appears as a mirrored volume to the VMware server.
Attention: The risk of losing data when the storage migration wizard is used correctly is 
low. However, it is prudent to avoid potential data loss by creating a backup of all the data 
that is stored on the hosts, the storage systems, and the Storwize V7000 before the wizard 
is used.