Volume Logix and masking

Use Volume Logix to restrict access to particular WWPNs on the fabric for Symmetrix Volumes.

This function can be switched on and off by changing the VMC_State port setting. The Storwize® V3700 system requires that you do not share target ports between a host and a Storwize V3700 system. However, you can still use Volume Logix to protect the system from errors that can occur if the SAN is not correctly configured.

To mask a volume to the Storwize V3700 system, you must first identify the system ports that are connected to each system. Identify the ports by using the EMC Symmetrix symmask command.

The Storwize V3700 system automatically logs in to any EMC Symmetrix system that it sees on the fabric. Use the Storwize V3700 lsnode CLI command to find the correct port identifiers.

After you have identified the ports, you can map each volume on each port to each WWPN. The EMC Symmetrix stores the LUN masking in a database, so you must apply the changes you have made to refresh the contents of the database to view the changes.