Hot Migration from SAN Storage to SAN Storage

Make sure that the source and destination data storage are in the same cluster.
Before you migrate a virtual machine, detach the ISOs or LUN devices from the virtual machine first.
If a shared disk is attached to the virtual machine, the shared disk cannot be migrated. Detach the shared disk first.
Before you hot migrate a virtual machine with VF NICs attached, make sure:
- The virtual machine has VMTools installed and the VMTools is running.
- VF NIC VM migration may fail if the internal driver version of the VM is too low. Check and update the driver version as needed

In the navigation pane, choose Inventory > VM and Host.
Select the target virtual machine and click Actions > Migration Management > Change Data Storage.
In the Change Data Storage dialog, choose a destination data storage and set a migration bandwidth as needed.
Review the configuration and click OK.
- If the virtual machines have VF NICs attached, depending on the actual network environment, short network interruptions may occur during the migration of VMs with VF NICs attached. Proceed with caution.
- If the virtual machines have snapshots, migrating storage while the VMs are running will delete these snapshots. Proceed with caution. To keep snapshots, shut down VMs before the migration.

After the migration, you can re-attach those data disks, ISOs, or peripheral devices to the virtual machine.