– Bart's blog

IBM i and PowerVM features and tools

Tag Archives: SAN

Changing WWPN of a virtual fiber adapter

You’ve probably noticed WWPNs are automatically generated by a HMC.  But you might get to the point when you need specific World Wide Port Name. Each HBA must have an unique number.  That’s why IBM didn’t give us a choice, and generates these strings automatically. First few characters (C050760….) define a virtual resource. The rest of the string is unique.  A serial number of a console is used to generate distinctive identifier. The problem is when you do some maintenance work, and you lost your ‘old’ WWPN, or you need to migrate to a different VIOS. In most situation you can reconfigure your SAN infrastructure. But if you need to keep a WWPN, you can explicitly set it from a HMC command line. Read more of this post