In my previous post I described how to reformat an Isilon node if for some reason the cluster creation is defective. After we got our new Gen 6 clusters up and running, we ran into another peculiar issue: the Isilon nodes lose network connectivity after a reboot. If we would then unplug the network cable and move it to a different port on the Isilon node, the network would come online again. Move the cable back to the original port: connectivity OK. Reboot the node: “no carrier” on the interface, and no connectivity.
A Brocade firmware upgrade once in a while is highly recommended: new releases usually squash bugs and add new features, which helps with a stable and efficient SAN infrastructure. The upgrade process itself is relatively straightforward if you keep in mind that you can only non-disruptively upgrade one major release at a time. With that knowledge you only need a FTP server (like Filezilla), SSH client (PuTTY), the upgrade packages and some patience.