To set the expectations right. Unless SmartPools is licensed you will not have a default pool policy. You will not be able to move data from the old nodes (in advance) or prevent new data from being written to them. Still you can follow the above migration. Depending on the node size and amount of data stored on the old nodes, a SmartFail will take some time as it reprotects the data on the other nodes. SmartFailed node is still available so it will read and copy from it so it is quite fast. When the last of the old nodes is SmartFailed all data will be on the new nodes and the migration is done.  From my experience I try to set the customer expectation at 1-2days to SmartFail a node (X400 and NL400 nodes)  Other option is to use SyncIQ. Setup a new cluster with the new nodes and SyncIQ data there. Use Superna Eyeglass for a better switchover when done. This needs a lot more planing. Snapshots will not transfer over etc. Other dependencies might make this option a bad and difficult choice. Only use this if you absolutely need Eth switches in the back-end.   /Sam
What are best available solutions for migrating from Isilon Gen5 to Isilon Gen6 hardware.   Please suggest available options.
Migrate from Isilon Gen5 to Gen6